Question

Rezolvati in Z ecuatiile :
a) -2x-5=3
b) 3x+7=1
c) 4x-12=-7
d) ( 2x-1 )=5
e) (2x + 1 ) = ( x-2 ) .

Answer 1

a)-2x-5=3
-2x=8
x=4
b) 3x+7=1
3x=-6
x=-2
c)4x-12=-7
4x=5
x=$\frac{4}{5}$
d) (2x-1)=5
2x-1=5
2x=6
x=3
e) 2x+1=x-2
 2x-x=-2-1
x=-3