Question

1) resolva as seguintes equações:
a)8a+12=-60

b)4x=32
2

C) 4y-1=15

D) 3x-6=54-2x

E) w-7=5
3

F) k +9=-9
6

Answer 1

Resposta:

$8a+12=-60\\\\8a+12-12=-60-12\\\\8a=-72\\\\\frac{8a}{8}=\frac{-72}{8}\\\\a=-9\\\\\\\\4x=32\\\\\frac{4x}{4}=\frac{32}{4}\\\\x=8\\\\\\\\4y-1=15\\\\4y-1+1=15+1\\\\4y=16\\\\\frac{4y}{4}=\frac{16}{4}\\\\y=4$

$3x-6=54-2x\\\\3x-6+6=54-2x+6\\\\3x=-2x+60\\\\3x+2x=-2x+60+2x\\\\5x=60\\\\\frac{5x}{5}=\frac{60}{5}\\\\x=12\\\\\\\\w-7=53\\\\w-7+7=53+7\\\\w=60\\\\\\\\k +9=-96\\\\k+9-9=-96-9\\\\k=-105$