Răspuns:
Explicație pas cu pas:
a) 3x+15=-x+3
4x= -12
x= -3
b) 5-3x=x-7
4x=12
x=3
c) 3(x-2)=5(x-4)
3x-6=5x-20
2x=14
x=7
d)3x-6=x+8
2x=14
x=7
e)2x-5=6x+15
4x= -20
x= -5
f)5(10x+4)=5(8x-3)
50x +20=40x-15
10x = -35
x= -35/10 = -3,5
g)5(x+1)-3(x-3)=-20
5x +5 -3x +9 = -20
2x = -20-5-9
2x= -34
x= -17
succes !