Question

1) Faça os cálculos das seguintes equações

a)
$3(x - 5) + 2(x + 8) = 28$
b)
$5 x + 3 = 28$
c)
$2x - 8 = x + 8$
d)
$8(x - 3) - 3(x + 5) = 12$
e)
$12 x + 15 - 8x = 101x - 5$
f)
$5x - 12 = 3x - 10$
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Answer 1

B

5x+3=28

5x=28-3

5x=25

x=25÷5

×=5

C.

2x-8=x+8

2x-x=8+8

3x=16

x=16÷3

x=5.3

E.

12x+15-8x=101x-5

12x-101x-8x=-5-15

-97x=20

x=20+97

x=117

F.

5x-12=3x-10

5x-3x=-10+12

2x=2

x=2÷2

x=1