Question

Resolva as equações: a) 2x= 35- 3x b) -6x-2=18-2x c) 9x-24=-3+5x d) -x-4=3x+15 e) 3x+2=-13

Answer 1

A)

2x=35 - 3x

$2x + 3x = 35 \\ 5x = 35 \\ x = \frac{35}{5} \\ x = 7$

B) -6x - 2= 18- 2x

$- 6x + 2x = 18 + 2 \\ - 4x = 20 \\ - x = \frac{20}{4} \\ (- x = 5) \times ( - 1) \\ x = - 5$

C) 9x -24 = - 3+5x

$9x - 5x = - 3 + 24 \\ 4x = 21 \\ x = \frac{21}{4}$

D) -x-4 = 3x+15

$- x - 3x = 15 + 4 \\ - 4x = 19 \\ ( - x = \frac{19}{4} ) \times ( - 1) \\x = - \frac{19}{4}$

E) 3x + 2= -13

$3x = - 13 - 2 \\ 3x = - 15 \\ x = \frac{15}{3} \\ x = 5$