Question

Resolva as equações, sendo U=Q:

a) -9x+8=-43

b) x-3(4-x)=7x-(1-x)
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Answer 1

a) -9x + 8 = -43

-9x = -43 - 8

-9x = -51 (.-1)

x = 51/9

x = 17/3 ≈ 5,6

b) x - 3(4-x) = 7x - (1-x)

x - 12 + 3x = 7x - 1 + x

-12 + 3x = 7x - 1

3x - 7x = -1 + 12

-4x = 11 (.-1)

x = - 11/4 ≈ - 2,75