Răspuns:
a) 2x+4-x+1=5x
x+5=5x
x-5x=-5
-4x= -5
x= 1.25
b) 3(3-3x+1+3)=54
3(3x+7)=54
9x+21=54
9x=33
x=3,(6)
d) 6-3+3x+2x-10=3
3+3x+2x-10=3
5x-7=3
5x=10
x=2
e)6x+3-5x-10=3x-4
x-7=3x-4
-2x=3
x= -1,5
g) 5x-8x-12=3-8+10x
-3x-12= -5+10x
-13x=7
x= -1,85
h)4x+6x-2=1+(3x-3)40
10x-2=1+120x-120
130x=-117
(cred ca e gresit ex asta sau ai uitat un semn)