b + 7 = 18
subtract 7 from each side
b + 7 - 7 = 18 - 7
b = 11
----------------check in original equation
11 + 7 = 18
18 = 18
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y= -25
x= -8
3t + 7 = 2t - 5 3t = 2t - 12 t = -12
- 3.5 plus 10.5 equals 7 is one possible answer.
4x - 3 - 5x + 7 = 6 4x - 5x = 3 - 7 + 6 -1x = 2 x = -2