2x+3x=10
5x=10
x=10/5
x=2
2x(2-5)=3
4x-10=3
-6x=3
x=3+(-6)
x=-3
20y+15y=35
35y=35
y=35/35
y=1
50y-20y+10y=160
80y=160
y=160/80
y=2
120y:12y=100
10y=100
y=100/10
y=10
Si asa mai departe ... cred ca ai inteles cum se fac. Apropo "/" inseamna supra Succes !