4x-3(20-x)=60-5(9-x)
问题描述:
4x-3(20-x)=60-5(9-x)
答
4x-3(20-x)=60-5(9-x)
4x-60+3x=60-45+5x
4x+3x-5x=60-45+60
2x=75
x=75/2
x=37.5
答
4x-3(20-x)=60-5(9-x);
4x-60+3x=60-45+5x;
2x=75;
x=75/2
答
4x-3(20-x)=60-5(9-x)
4x-60+3x=60-45+5x
2x=75
x=75/2