Question

Resolva as equações.
(A) 3x + 2=2x
(B) 9y -8 = y
(C) 8 ( a + 2) = 9a
(D) 2 - ( 5s + 7) = 7 + s

Answer 1

Explicação passo-a-passo:

(A) 3x + 2=2x

3x-2x=-2

x=-2

(B) 9y -8 = y

9y-y=8

8y=8

y=8/8

y=1

(C) 8 ( a + 2) = 9a

8a+16=9a

8a-9a=-16

-a=-16

a=-16/-1

a=16

(D) 2 - ( 5s + 7) = 7 + s

2-5s-7=7+s

-5s-s=7+7-2

-6s=14-2

-6s=12

s=12/-6

s=-2