a, X : 3 x 48 + X : 4 x 36 = 1500

    X x \(\dfrac{1}{3}\) x 48 + X x \(\dfrac{1}{4}\) x 36 = 1500

    X x 16 + X x 9 = 1500

    X x ( 16 + 9 ) = 1500

    X x 25 = 1500

    X = 1500 : 25

    X = 60

b, X + 7,5 x X : 5 + X : 2 x 9 = 315

    X + 7,5 x X x \(\dfrac{1}{5}\) + X x \(\dfrac{1}{2}\) x 9 = 315

    X + X x 1,5 + X x 4,5 = 315

    X x ( 1 + 1,5 + 4,5 ) = 315

    X x 7 = 315

    X = 315 : 7

    X = 45

Ta có: \(25\%\times m+\frac34\times m+m:0,125+m=10\)

=>\(0,25\times m+0,75\times m+m\times8+m=10\)

=>\(m\times\left(0,25+0,75+8+1\right)=10\)

=>10m=10

=>m=1

`x : 1/2 + x : 1/3 + x : 0,1 - x xx 5 = 100`

`x xx 2 + x xx 3 + x xx 10 - x xx 5 = 100`

`x xx ( 2 + 3 + 10 - 5 ) = 100`

`x xx 10 = 100`

`x          = 100 : 10`

`x          = 10`

Vậy `x = 10`

Lời giải:
$x:\frac{1}{2}+x:\frac{1}{3}+x:0,1-x\times 5=100$

$x\times 2+x\times  3+x\times 10-x\times 5=100$

$x\times (2+3+10-5)=100$

$x\times 10=100$

$x=100:10=10$

11+11=22

22 nha ban

2222 nha ban

1111 + 1111

= 2222

has been 

as big as

very excited 

haven't sold

enjoyable

has been 
as big as

very excited
haven't solo
Enjoyable

Lời giải:
$x:\frac{1}{2}+x:\frac{1}{3}+x:0,1-x\times 5=100$

$x\times 2+x\times 3+x\times 10-x\times 5=100$

$x\times (2+3+10-5)=100$

$x\times 10=100$

$x=100:10$

$x=10$

chịu

bài nào