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3(4x+7)-5x-1=6x+30
12x+21-5x-1=6x+30
12x-5x-6x=30+1-21
x=10
x+5 2x+1 1
___ - ____ = __ (2-x) /8
4 8 2
2(x+5)-2x+1=4(2-x)
2x+10-2x+1=8-4x
4x=8-10-1
4x=-3 /4
x=-¾