Two-step equations
2x+5=11
x=3
(x/3) + 5 = 9
x = 12
3x + 4 = x + 10
x = 3
2x + 5 = 11
2x = 16
x = 8
Mistake was adding 5 - they should've subtracted 5
(x/3)+4=10
x=18
(2x-1)/4 = 3
x = 6.5
5x - 7 = 2x + 8
x = 5
3(x-2)
3x + 6
6 should be negative - a positive times a negative equals a negative
7x-9=26
x=5
(2x/5) - (1/2) = 5
x = 55/4 or 13.75
6x + 2 = 4x + 12
x = 5
6 - 2x - 1 = 4x + 8 - 6x - 3
7 - 2x = 2x + 11
They didn't combine like terms correctly
-5x+12=-8
x=4
(2/3)r + (3/4) = (7/12)
r = -(1/4) or -0.25
7x - 3 = 5x + 9
x = 6
x - (2x + 5)
x - 2x + 5
-x + 5
They didn't distribute the negative to the 5
(3x-1)/2=10
x=7
(3/4)u + (1/2) = (7/8)
u=(1/2) or .5
2(x+3) = 3(x-2) + 4
8 = x
2(x + 3) = 3(x - 2) + 4
2x + 3 = 3x - 6 + 4
2x + 3 = 3x - 2
x = 5
They did not distribute the 2 to the 3 in the first step