Răspuns :
2(x+5)+4x=82⇒2x+10+4x=82⇒6x=72⇒x=72/6⇒x=12
3(2x+10)-20=4(x+20)⇒6x+30-20=4x+80⇒2x+10=80⇒2x=70⇒x=70/2⇒x=35
3(2x+10)-20=4(x+20)⇒6x+30-20=4x+80⇒2x+10=80⇒2x=70⇒x=70/2⇒x=35
2x+10+4x=82
6x+10=82
6x=72
x=12
6x+30-20=4x+20
6x+10=4x+20. |-10
6x=4x+10. |-4x
2x=10
x=5
6x+10=82
6x=72
x=12
6x+30-20=4x+20
6x+10=4x+20. |-10
6x=4x+10. |-4x
2x=10
x=5