Question

Quanto é: 2×+3 (-×+1)=5

Answer 1

2x + 3.(- x + 1) = 5
2x - 3x + 3 = 5
- x + 3 = 5
- x = 5 - 3
- x = 2  (-1)
x = - 2

Answer 2

2x+3(-x+1)=5
2x-3x+3=5
-x=5-3
-x=2 (-1)
x=-2
Resposta: -2