Question

Resolva as equações abaixo:
a) (-9) + (-13) + 28 = 3/2 x
b) 1/2 s + 4/2 = 8 . 3 + (-4)

Answer 1

$a)\\\\-9-13+28=\frac{3}{2x}\\-22+28=\frac{3}{2x}\\6=\frac{3}{2x}\\12x=3\\\\\boxed{x=4}$

$b)\\\\\frac{1}{2s}+\frac{4}{2}=8.3-4\\\frac{1}{2s}+2=24-4\\\\\frac{1+4s}{2s}=20\\\\1+4s=40s\\1=32s\\\\\boxed{s=\frac{1}{32}}$