Question

Resolva as equações:

-x+3=-2x+1

0,5x-3=-3,5+1,5x

2a-3=a+5

3x-1=-x+3

Answer 1

$- x + 3 = - 2x + 1 \\ - x + 2x = 1 - 3 \\ x = - 2$

$0.5x - 3 = - 3.5 + 1.5 x \\ 0.5x - 1.5x = - 3.5 + 3 \\ - 1x = - 0.5 \\ - x = - \frac{0.5}{1} \\ - x = - 0.5 \times ( - 1) \\ x = 0.5$

$2a - 3 = a + 5 \\ 2a - a = 5 + 3 \\ a = 8$

$3x - 1 = 3x + 3 \\ 3x - x = 3 + 1 \\ 2x = 4 \\ x = \frac{4}{2} \\ x = 2$