Question

tìm x biết:

10(x-7)-8(x+5)=6(-5)+24

 

Answer 1

10(x-7)-8(x+5)=6(-5)+24

(10.x - 10.7) - (8.x + 8.5) = -30 + 24

10.x - 70 - 8.x + 40 = -6

(10.x-8.x) - (70 - 40) = -6

2.x - 30 = -6

2.x = -6 + 30

2.x = 24

x = 24 : 2

x = 12

vậy_____

Answer 2

10( x- 7)- 8( x+ 5)= 6(- 5)+ 24.

( 10x- 70)-( 8x+ 40)=- 30+ 24.

10x- 70- 8x- 40=- 6.

( 10x- 8x)-( 70+ 40)=- 6.

2x- 110=- 6.

2x=- 6+ 110.

2x= 104.

x= 104: 2.

x= 52.

Vậy x= 52.