Question

-Resolva as equações:
a) -3x - 17 = -21
b) 2x - 8 = - 7x
c) 3x + 2 = 2x - 11

Answer 1

$a)3x = - 21 + 17 \\ 3x = - 4 \\ x \frac{4}{3}$

$b)2x - 7x =8 \\ 9x = 8 \\ x = \frac{8}{9}$

$c)3x - 2x = 2 - 11 \\ x = - 11 - 2 \\ x - 13$