Question

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Answer 1

EQUAÇÃO DO 1° GRAU!!

A) 2 ( x + 5) - x = 30 - x
2x + 10 - x = 30 - x
2x - x + x = 30 - 10
2x = 20
x = 20 / 2
x = 10

B) 2x + 10 = x - 13
2x - x = - 13 - 10
x = - 23

C) 4 (x - 3) = 2 - (x + 1)
4x - 12 = 2 - x - 1
4x + x = 2 - 1 + 12
5x = 1 + 12
5x = 13
x = 13 / 5