1)\(4\left(x-5\right)-3\left(x+7\right)=-19\)

2)\(7\left(x-3\right)-5\left(3-x\right)=11x-5\)

3)\(4\left(2-x\right)+4\left(x-3\right)=14\)

4)\(-5\left(2-x\right)+4\left(x-3\right)=10x-15\)

5)\(7\left(x-9\right)-5\left(6-x\right)=-5+11x\)

6)\(-7\left(3x-5\right)+2\left(7x-14\right)=28\)

7)\(4\left(x-5\right)-3\left(x+7\right)=5.\left(-4\right)\)

Bài 1: Tính:

A=\(\left(-2\right).\left(-3\right)-5.\left|-5\right|+125.\left(\dfrac{-1}{5}\right)^2\)

B=\(\left(-3\right).\left|-7\right|-\left(-4\right).\left|5\right|+\dfrac{1}{3}.\left|-9\right|\)

C=\(\left(-2\right)^3.\left|-3\right|-\dfrac{1}{5}.\left|-25\right|-4.\left|-7\right|+\left(-2\right)^2\)

D=\(\left(-6\right).\left|-3\right|+2.\left|-9\right|-7\left|\left(-2\right)^3\right|+8.\left|-7\right|\)

E=\(\left|-3^2\right|.\left|4\right|-\left|7\right|.8-\left|6\right|.\left|-8\right|-\left|12\right|.\left(\dfrac{1}{2}\right)^2\)

Bài 2: Tìm x:

a)\(12-2\left|3x+2\right|=10\)

b)\(2.\left|5-4x\right|+17=\left(-2\right)^3.\left(-4\right)\)

c)\(\left|3x-5\right|+\left(-3\right)^2.2=12.\left|3x+5\right|+117\)

d)\(4.\left|3-2x\right|+\left(-5\right).\left|4-3x\right|-5=-6\)

e)\(\left|2x-7\right|-2^3.\left|2x-7\right|+15=-5.\left|2x-7\right|+3\)

f)\(\left|x+2\right|+\left|x^2-4\right|=0\)

g)\(\left|3x-9\right|+\left|x^2-9\right|=0\)

h)\(\left|2x-1\right|+\left|x^2-\dfrac{1}{4}\right|=0\)

Tính:

A=\(\left(1-\frac{2}{3}+\frac{4}{3}\right)-\left(\frac{4}{5}-1\right)+\left(\frac{7}{5}+2\right)\)

B=\(\left(-3+\frac{3}{4}-\frac{1}{3}\right):\left(5+\frac{2}{5}-\frac{2}{3}\right)\)

C=\(\left(\frac{3}{5}-\frac{4}{15}\right).\left(\frac{2}{7}-\frac{3}{14}\right)-\left(\frac{5}{9}-\frac{7}{27}\right)\)\(.\left(1-\frac{3}{5}\right)+\left(1-\frac{11}{12}\right).\left(1+\frac{11}{12}\right)\)

D=\(\frac{\left(\frac{3}{10}-\frac{4}{15}-\frac{7}{20}\right).\frac{-5}{19}}{\left(\frac{1}{14}+\frac{1}{7}-\frac{-3}{35}\right).\frac{4}{3}}\)

Rút gọn:

a,\(\left(\frac{2}{3}\right)^3\):\(\left(\frac{-1}{3}\right)^5\)b,\(\left(\frac{5}{7}\right)^6\):\(\left(-\frac{25}{49^{ }}\right)^3\)

c,\(\left(-\frac{2}{9}\right)^4\).\(\left(\frac{27}{16}\right)^7\)d,\(\left(\frac{1}{3}\right)^6\).\(\left(-\frac{21}{19}\right)^3\)

\(a.2\left(x-5\right)-3\left(x+7\right)=14\)

\(b.5\left(x-6\right)-2\left(x+3\right)=12\)

\(c.3\left(x-4\right)-\left(8-x\right)=12\)

\(d.-7\left(3x-5\right)+2\left(7x-14\right)=28\)

\(e.5\left(3-2x\right)+5\left(x-4\right)=6-4x\)

\(f.-5\left(2-x\right)+4\left(x-3\right)=10x-15\)

\(g.2\left(4x-8\right)-7\left(3+x\right)=|-4|\left(3-2\right)\)

\(h.8\left(x-|-7|\right)-6\left(x-2\right)=|-8|.6-50\)

cứ từ từ mà giải cũng đc

Tìm số nguyên x

1/ \(17x+3\left(-16x-37\right)=2x+43-4x\)

2/ \(-2x-3\left(x-17\right)=34-2\left(-x+25\right)\)

3/ \(\left\{-3x+2\left[45-x-3\left(3x+7\right)-2x\right]+4x\right\}=55-103-57:\left[-2\left(2x-1\right)^2-\left(-9\right)^0\right]=-106\)

4/ \(-2x+3\left\{12-2\left[3x-\left(20+2x\right)-4x\right]+1\right\}=45\)

5/ \(3x-32>-5+1\)

6/ \(15+4x< 2x-145\)

7/ \(-3\left(2x+5\right)-16< -4\left(3-2x\right)\)

8/ \(-2x+15< 3x-7< 19-x\)

Tìm \(x\in Z\):

a. \(2\times\left(x-5\right)-3\times\left(x-4\right)=\left(-6\right)+15\times\left(-3\right)\)

b.\(\left(2x-5\right)-7=22\)

c.\(\left(2\times\left|x\right|-6\right)\times11=44\)

d.\(\left|x+3\right|+\left|x+5\right|+\left|x+9\right|=4x\)

e.\(\left|x-1\right|+\left|x-5\right|=4\)

g.\(x+\left(x+1\right)+\left(x+2\right)+.......+100=0\)