4(3x-5)+3(4x-7)=10x-13
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2016-04-16 01:24:42
12x-20+12x-21=10x-13 24x-41=10x-13 24x-10x=-13+41 14x=28 x=28:14 x=2
2016-04-16 01:25:57
4(3x-5)+3(4x-7)=10x-13 12x-20+12x-21=10x-13 24x-10x=20+21-13 14x=28 x=28:14 a=2
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