Question

Calcule as raízes das equações abaixo


a)9x -2=4x+18

b2y-10+7y+10=180

c)2·(x+5)-4=26

d)4(2m-1)+3m=2(4m-1)-2

Answer 1

Resposta:

a)9×-2=4×+18

9×-4×=18+2=

9×-4×=20

5×=20

×=20÷5

×=4

b)2y-10+7y+10=180

2y+7y=180+10-10=

2y+7y=180

9y=180

y=180÷9

y=20

c)2.(×+5)-4=26

2×+10-4=26

2×=26-10+4

2×=20

×=20÷2

×=10