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8*0.85(x+45)-8X=12(45+x-35)-12x
人气:491 ℃ 时间:2020-03-28 13:36:02
解答
8 X 0.85(x + 45) - 8x = 12(45 + x - 35) -12x4 X[ 2X 0.85(x + 45) - 2x ] = 4 X[ 3(10 + x) - 3x ]1.7(x + 45) - 2x = 3x + 30 - 3x1.7x + 45X1.7 - 2x = 3045X1.7 - 0.3x = 3045X17 - 3x = 30015X17 - x = 100x ...
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