Răspuns :
5x-7x+11=2-x+6
-2x+x = 6 - 11 +2
-x = - 3
x = 3
-6-2x+3=20+5x
-2x - 5x = 20 -3+6
-7x = 23
x = -23/7
5x-7x+11=2-x+6, -2x+11=8-x, x=11-8=3
-6-2x+3=20+5x, 7x=-20-6+3=-26+3=23, x=-23/7
5x-7x+11=2-x+6
-2x+x = 6 - 11 +2
-x = - 3
x = 3
-6-2x+3=20+5x
-2x - 5x = 20 -3+6
-7x = 23
x = -23/7
5x-7x+11=2-x+6, -2x+11=8-x, x=11-8=3
-6-2x+3=20+5x, 7x=-20-6+3=-26+3=23, x=-23/7