9/25×17/36+13/35×7/26(脱式计算) X+15%X=170 3X-60X=288 80%X-0.4×1.2=1/5(解方程)

问题描述:

9/25×17/36+13/35×7/26(脱式计算) X+15%X=170 3X-60X=288 80%X-0.4×1.2=1/5(解方程)
9/25×17/36+13/35×7/26(脱式计算)
解方程:X+15%X=170
3X-60X=288
80%X-0.4×1.2=1/5

9/25×17/36+13/35×7/26=9*17/25*36+13*7/35*26=0.17+0.1=0.27X+15%X=170 x+0.15x=1701.15x=170x=147.833X-60X=288 -57x=288x=-288/57=-5.0580%X-0.4×1.2=1/50.8x-0.48=0.20.8x=0.68x=0.853/5÷6/5-3X=1/53/5÷6/5-3X=1/53/5*5/6-3x=0.20.5-3x=0.2-3x=-0.3x=0.1