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p = 3 - 4
p = -1
b. 9 - 3r = 6
-3r = 6 - 9
-3r = - 3
r = 1
c. 18 = 10 - 2m
2m = 10 - 18
2m = - 8
m = -4
d. 1 = 9 + x
-x = 9 - 1
-x = 8
x = -8
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p = -4 + 3
p = -1
b. -3r = -9 + 6
r = 1
c. 2m = -18 + 10
m = -4
d. -x = -1 + 9
-x = 8