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4p - 2p = 5 + 9
2p = 14
p = 14/2
p = 7
2.) -2a + 4 = -5a + 7
-2a + 5a = -4 + 7
3a = 3
a = 3/3
a = 1
3.) -7a + 3 = 5a + 9
-7a - 5a = 3 + 9
-2a = 12
a = 12/-2
a = -6
4.) 5z/4 = 10
5z = 10 x 4
5z = 40
z = 40/5
z = 8
5.) y - 3 1/2 = 2 1/2
y - 3,5 = 2,5
y = 2,5 + 3,5
y = 6
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