Question

4. Encontre as raizes das equações do 1° grau:

a) 9x - 2 = 4x + 18
b) 2x -10 + 7x + 10 = 180
c) 7y-10 = y + 50
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Answer 1

Resposta:

a)×=4

b)×=20

c)y=10

Explicação passo-a-passo:

a)9×-2=4×+18

9×-4×=18+2

5×=20

×=20÷5

×=4

b)2× -10+ 7× +10=180

2× + 7×=180+10-10

9×=180

×=180÷9

×=20

c)7y-10=y+50

7y-y=50+10

6y=60

y=60÷6

y=10