Sagot :
3x+2=x+6
3x+2-x=x+6-x
2x+2=+6
2x+2-2=+6-2
2x=4
x=4/2
x=2
-8x+3=5x-2
-8x+3-5x=5x-2-5x
-13x+3=-2
-13x+3-3=-2-3
-13x=-5
x=-5/-13
voilà...... :)
3x+2=x+6
3x+2-x=x+6-x
2x+2=+6
2x+2-2=+6-2
2x=4
x=4/2
x=2
verficication¨:
(3x2)+2=2+6
6+2=2+6
-8x+3=5x-2
-8x+3-5x=5x-2-5x
-13x+3=-2
-13x+3-3=-2-3
-13x=-5
x=5/13
verification:
(-8x5/13)+3=(5x5/13)-2
-40/13+3=25/13-2
-40/13+39/13= 25/13-26/13
-1/13=-1/13