4x-338=68
4x=338+68
4x=456
(35-x)=120-20.
(35-x)=100.
35-x=100
x=35:100
x=0.35.
940-2a=0
-2a=-940
a=(-2):(-940)
a=470
620:(c+24)=10
(c+24)=-620+10
(c+24)=-610
c+24=-610
c=-610-24
c=634
4x-338=68
4x=338+68
4x=456
(35-x)=120-20.
(35-x)=100.
35-x=100
x=35:100
x=0.35.
940-2a=0
-2a=-940
a=(-2):(-940)
a=470
620:(c+24)=10
(c+24)=-620+10
(c+24)=-610
c+24=-610
c=-610-24
c=634