Question

Quanto é? Preciso imediatamente​

Answer 1

d)

3x=9*4

3x=36

x=36/3

x=12

e)

2x=-4*5

2x=-20

x=-20/2

x=-10

f)

2x=-10*3

2x=-30

x=-30/2

x=-15

Answer 2

d)

$\frac{3x}{4} =9\\\\3x*1=9*4\\\\3x=36\\x=\frac{36}{3}\\\\x=12$

e)

$\frac{2x}{5} =-4\\\\2x*1=-4*5\\\\2x=-20\\\\x=\frac{-20}{2}\\\\x=-10$

f)

$\frac{2x}{3} =-10\\\\2x*1=-10*3\\\\2x=-30\\\\x=\frac{-30}{2}\\\\x=-15$