Răspuns :
a)5x+10=20
5x=10 =>x=2
b)4x-28=28
4x=56 =>x=14
c)6x+42=54
6x=12 =>x=2
d)72=8x-8
80=8x =>x=10
e)98=7x+28
70=7x =>x=10
5x=10 =>x=2
b)4x-28=28
4x=56 =>x=14
c)6x+42=54
6x=12 =>x=2
d)72=8x-8
80=8x =>x=10
e)98=7x+28
70=7x =>x=10
a. 5(x+2)=20
x+2=4
x=2
b. 4(x-7)=28
x-7=4
x=11
c. 6(x+7)=54
x+7=9
x=2
d. 72=8(x-1)
x-1=9
x=10
e. 98=7(x+4)
x+4=14
x=10
x+2=4
x=2
b. 4(x-7)=28
x-7=4
x=11
c. 6(x+7)=54
x+7=9
x=2
d. 72=8(x-1)
x-1=9
x=10
e. 98=7(x+4)
x+4=14
x=10