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Anonymous
6x-7 = 4x+23
(take the x terms on one side and the number terms on the other)
6x -4x = 23 + 7
therefore
2x = 30
x=30/2
x=15
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2x + 7 + 2x = 23 4x + 7 = 23 4x = 16 x = 16/4 x = 4
4x =20x=20/4x=5
y = 4x-3
5x + 20 = 4x +30 5x - 4x = 30 - 20 x = 10
2y = 4x + 4y = 2x + 2