Question

b) 4x - 9 = 15
c) 5x+5=20
d) 4×+10=30
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Answer 1

Resposta:

B)4x-9=1-2x

4x+2x=1+9

6x=10

C)x+5=20-4x

x+4x=20-5

5x=15

x=15/5

x=3

D)9x-4x+10=7x-30

5x-7x=-30-10

2x=-40

x=40/2

x=20

Explicação passo-a-passo: