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Anonymous
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-46 = 3x + 7x
3+3x+7x=13 3x+7x=10 10x=10 x=1
3x+7x+3+y= 10x+3+y
8+7x = 20+3x 7x-3x = 20-8 4x = 12 x = 3
simplify it, 7x-12=x+2+2x-3x 7x=2+12+3x-3x 7x=14 x=2