Question

Rezolvați ecuațiile următoare:
-15x+8x+4=4-2x
+x-4+3=4x-2
5x-5=1+7x-12
7x-9=3x-7

Answer 1

-15x+8x+4=4-2x
-7x+4=4-2x
-7x+2x=4-4
-5x=0
x=0

x-4+3=4x-2
x-7=4x-2
x-4x=2+7
-3x=9
x=-3

5x+5=1+7x-12
5x-7x=1-12-5
-2x=-16
x=8

7x-9=3x-7
7x-3x=9-7
4x=2
x=0.5

Answer 2

-15x+8x+4=4-2x
-7x+2x=4-4
-5x=0
x=-0:5
x=0
+x-4+3=4x-2
x-4x=-2+1
-3x=-1
x=1/3
5x-5=1+7x-12
5x-7x=-1+5
-2x=4
-x=4/2
x=-2
7x-9=3x-7
7x-3x=9-7
4x=2
x=2/4
x=1/2