3/4[(x+30)-10]=x+10

问题描述:

3/4[(x+30)-10]=x+10

3/4(x+20)=x+10
3/4x-x=10-15
-1/4x=-5
x=20

3/4[(x+30)-10]=x+10
3/4(x+30-10)=x+10
3/4(x+20)=x+10
3(x+20)=4(x+10)
3x+60=4x+40
4x-3x=60-40
x=20

3/4[(x+30)-10]=x+10
3(x+20)=4(x+10)
3x+60=4x+40
4x-3x=60-40
x=20