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3 + 3x = 4x +5
x = -2
r + 3 = 8r +10
r = -1
1 + 2k = k - 3
-4
-2 - 3x = -2x +5
x = -7
32 + 6k = 8(-6k+4)
k = 0
-2n -24 = 4(4-3n)
n = 4
-7 (3+ 4x) = -8x - 21
x = 0
2 (x + 8) = -2x -8
x = -6
-7x - 12 = -6x -4x
x=4
