Question

解方程三道；2x-10%x=22.8 x+35%x=32.5 3x-30%x=108

Answer 1

2X-10%X=22.8

2X-0.1X=22.8

1.9X=22.8

X=22.8÷1.9

X=12

X+35%X=32.5

1.35X=32.5

X=24.074074……

3X-30%X=108

2.7X=108

X=40