Resposta:
A) X=20
B) Y= -4
C) X = 1
D) X = -4/3
Explicação passo a passo:
A)2.(x+5)=x+30
2x + 10 = x + 30
2x - x = 30 - 10
X=20
B)3y+16=y+8
3y - y = 8 - 16
2y = -8
y = -8/2
Y= -4
C)150x-20=100x+30
150x -100x = 30 + 20
50x = 50
x = 50/50
X = 1
D)5(x+2)=2.(x+3)
5x + 10 = 2x + 6
5x - 2x = 6 -10
3x = -4
X = -4/3
