\(2x+20=80-60\)
\(2x+20=20\)
\(2x=0\)
\(x=0\)
b,100x=1000:10
100x=100
x=100:100
x=1
c,250x+250=1750
250(x+1)=1750
x+1=1750:250
x+1=7
x=6
a,2x+20=80-60
2x+20=20
2x = 20-20
2x = 0
x = 0:2
x = 0
b,100x=1000/10
100x=100
x=100/100
x =1
c,250x+250=1750
250x =1750-250
250x =1500
x =1500/250
x =6