Răspuns :
a) (3x+ 7) -(2x+5)= 5
3x+7 -2x-5 = 5
x =5+5-7
x=3
b) 5-3x-27=5x+20
3x-5x=20-5+27
-2x=42
x=42: (-2)
x=-21
3x+7 -2x-5 = 5
x =5+5-7
x=3
b) 5-3x-27=5x+20
3x-5x=20-5+27
-2x=42
x=42: (-2)
x=-21
C)5(x-1)=2x+3 D)3x+4=3(x-2)
5x-5=2x+3 3x+4=3x-6
5x-2x=3+5 3x-3x=-6-4
3x=8 -10
x=8\3
5x-5=2x+3 3x+4=3x-6
5x-2x=3+5 3x-3x=-6-4
3x=8 -10
x=8\3