Question

5) Resolva as equações:
a) 8x - 7= 73
b) 22x - 35 = 31
c) 10y - 5 (1 + y) = - 45
d) 3(x + 4) + 2(x+2) = 24
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Answer 1

Resposta:

a) 8 x - 7 = 73

8 x = 73 + 7

8 x = 80

x = 80

8

x = 10

b) 22 x - 35 = 31

22 x = 31 + 35

22 x = 66

x = 66

22

x = 2

c) 10 y - 5 ( 1 + y ) = - 45

10 y - 5 y = - 45

5 y = - 45

y = - 45

5

y = - 9

d) 3 ( x + 4 ) + 2 ( x + 2 ) = 24

3 x + 12 + 2 x + 4 = 24

3 x + 2 x = 24 + 12 + 4

5 x = 40

x = 40

5

x = 8