8*0.85(x+45)-8X=12(45+x-35)-12x_数学解答

8*0.85(x+45)-8X=12(45+x-35)-12x

人气：287 ℃　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 ...