Question

2x+2 sob 8 4x-12 sob 12?
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Answer 1

X = 15.

2X + 2 = 4X - 12

8 12

Fazendo por regra de 3

12 × ( 2X + 2 ) = 8 × ( 4X - 12 )

24X + 24 = 32X - 96

24X - 32X = -96 - 24

-8X = -120

X = -120

-8

| X = 15. |