Question

2 Resolva as equações.
a) 3x + 2 = 2x
b) 9y - 8 = y
c) 8(a + 2) = 90
d) 2 - (55 + 7) = 7 + 5
4(2x – 10) = 2(x – 4)
e)
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Answer 1

Resposta:

A) 3x - 2x = - 2

x = - 2

B) 9y - y = 8

8y = 8

y = 8/8

y = 1

C) 8a +16 = 90

8a = 90 - 16

8a = 86

a = 86/8

a = 43/4

D) 2 - 62 = 12

-60 = - 12

Falso

E) 8x - 40 = 2x - 8

8x - 2x = 40 - 8

6x = 32

x = 32/6

x = 16/3