Question

me ajudem. é pra entregar hoje

Answer 1

3x + 12 = 9 + 2x
3x - 2x = 9 - 12
x = -3
===========================
5x - 8 = 12 + x
5x - x = 12 + 8
4x = 20
x = 20/4
x = 5
===========================
2(x + 5) - 3(5 - x) = 5
2x + 10 - 15 + 3x = 5
5x = 5 - 10 + 15
5x = 20 - 10
5x = 10
x = 10/5
x = 2
============================
(4x - 2) / 5 = (2x + 2) / 3
12x - 6 = 10x + 10
12x - 10x = 10 + 6
-2x = 16
x = -16/2
x = -8
============================
(x - 8) / 3 = (x - 2) / 5
5x - 40 = 3x - 6
5x - 3x = -6 + 40
2x = 34
x = 34/2
x = 17

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