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x = 68
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2) 30+3= 14x-3x
33 = 11x
3 = x
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3) 10x-2x = 68-8
8x = 60
x = 60/8
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4) 63 = 3x +6x
63 = 9x
7 = x
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5) 18x-10x = -24
8x = -24
x = -3
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6) 31x+4x = -135
35x = -135
x = -135/35
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7) 3x -2x = -36-2
x = -38
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