Răspuns :
a+b=190
a=3b-10
3b-10+b=190/+10
3b+b=200
4b=200/:4
b=50
a=140;b=50
a=3b-10
a=3x50-10
a=150-10
a=140
a=3b-10
3b-10+b=190/+10
3b+b=200
4b=200/:4
b=50
a=140;b=50
a=3b-10
a=3x50-10
a=150-10
a=140
a+b=190
b=ax3-10
ax3+a-10=190
4xa-10=190
4xa=190+10
4xa=200
a=200:4
a=50
b=50x3-10
b=150-10
b=140
proba:50+140=190
b=ax3-10
ax3+a-10=190
4xa-10=190
4xa=190+10
4xa=200
a=200:4
a=50
b=50x3-10
b=150-10
b=140
proba:50+140=190