Question

Resolva as equações a)6a+12=-30
B)3b-25=-7b+65
C)5(x-13)+2(2x+1)=54
D)-5(3-2y)-8=3(2y+3)

Answer 1

A) 6a = - 30 - 12
6a = - 42
a = - 42/6
a = 7

B) 3b + 7b = 65 + 25
10b = 90
b = 90/10
b = 9

C) 5x - 65 + 4x + 2 = 54
9x = 54 + 65 - 2
9x = 117
x = 117/9
x = 13

D) - 15 + 10y - 8 = 6y + 9
10y - 6y = 9 + 23
4y = 32
y = 32/4
y = 8