Question

Resolva : (x - 5)/10 + (1 - 2x)/5 = (3 - x)/4

Answer 1

(x - 5)÷10 + (1- 2x)÷5 = (3-x)÷4
(x-5)÷10 + 2×(1-2x)÷10 = (3-x)÷4
(x-5+2-4x)÷10 = (3 - x)÷ 4
(-5x-3) ÷ 10 = (3 - x)÷ 4
4×(-5x-3) = 10×(3-x)
-20x-12 = 30 - 10x
- 20x + 10x = 30 + 12
- 10x = 42  ×(-1)
10x = -42
x = -4,2