-7 + 3s - 4
Rearranging
3s -4 -7
3s -11
8(2r - 1)
open the parenthesis
16r -8
-(7p - 2)
-7p + 2
12t + 9 - 4x - 1
Rearrange
12t - 4x -1+9
12t-4x +8
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