Question

7+8 (3x +4x) -3+5 (2x-3)=40?

Answer 1

7 + 8 ( 3x + 4x) - 3 + 5 ( 2x - 3) = 40
7 + 8( 7x) - 3 + 10x - 15 = 40
7 + 56x - 3 + 10x - 15 = 40 
66x = 40 - 7 + 3 + 15 
66x = 51
x = 51/66 = 17/22 ***

Answer 2

7+8 .(3x +4x) -3+5 .(2x-3)=40
7 + 24x + 32x - 3 + 10x - 15 = 40
56x + 10x = 40 - 7 + 3 + 15
66x = 33 + 18
66x = 51
x = 51/66     ÷3
x = 17/22

Resposta : x = 17/22