3:

a: -5x-16=-46

=>-5x=-46+16=-30

=>5x=30

=>\(x=\dfrac{30}{5}=6\)

b: -80-(-16-x)=20

=>\(-x-16=-80-20=-100\)

=>x+16=100

=>x=100-16=84

2:

a: \(\left(45-3456\right)+3456\)

\(=45+3456-3456\)

=45

b: \(\left(77+22-75\right)-\left(-25-78-13\right)\)

\(=77+13+22+78-75+25\)

\(=90+100-50\)

=140

c: \(-25\cdot63-25\cdot37\)

\(=-25\left(63+37\right)\)

\(=-25\cdot100=-2500\)

hơn 702 đơn vị

ủng hộ nhé

Ai mà biết 

Hello

1) 20,22 : 0,5 + 20,22 : 0,125

= 20,22 x 2 + 20,22 x 8

= 20,22 x (2 + 8)

= 20,22 x 10

= 202,2

2) 3456 x 37 + 3456 x 19 + 3456 x 45 - 3456

= 3456 x 37 + 3456 x 19 + 3456 x 45 - 3456 x 1

= 3456 x (37 + 19 + 45 - 1)

= 3456 x 100

= 345600

19629134

3456*5678-1234 = 19623168-1234=19621934                            

247476

69690

1575936

2012 x 123=247476

3030 x 23 =69690

3456 x 456=1575936

\(x\times3456-x\times2556+x=27035\)
\(x\times\left(3456-2556+1\right)=27035\)
\(x\times901=27035\)
\(x=27035:901\)
\(x=\dfrac{27035}{901}\)
#AvoidMe

Tuyên bố : đề bài sai

1,16733125

Dùng calculator (máy tính) trên google:

3456 x 5763 x 8561 + 9999 = 170508830607

x + 3456 = 5478

            x = 5478 - 3456

            x = 2022

tk nhe Haruko

\(X=5478-3456=2022\)

(18-9x2)x(1234+2345+3456+4567)

=(18-18)x11602

=0x11602

=0

DAP AN LA 11602