Question

equação 10×-5 (1+×)=3 (2×-2)-20

Answer 1

10× - 5 (1 + ×) = 3 (2× - 2) - 20
10x - 5 -5x = 6x - 6 - 20
5x - 5 = 6x - 26
5x - 6x = - 26 + 5
- x = - 21               .(-1)
x = 21

Answer 2

10x -5 -5x = 6x - 6 -20 
10x -5x -6x = -6 -20 +5
- x = -21  .  (- 1)
x = 21