Question

Resolva as equações: a) 3(a + 1) = 21 b) y + y + 8 = 54 c) 4( x - 1) = 16 d) 5b + 4b = 27

Answer 1

Resposta:

a) 3a+3=21

3a=21-3

a=18/3

a =6

b) 2y=54-8

2y=46

y=23

c)4x-4=16

4x=16+4

x=20/5

x=4

d) 9b=27

b=27/9

b=3