If: 25k+12 = -13
Then: 25k = -13-12 => 25k = -25
So: k = -25/25 => -1
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It is the commutative property of addition.
(5, 1)
-10
-5x + x + 9 = -4x + 12 -4x + 9 = -4x + 12 9 = 12 This equation has no solution.
If: 4x+(-12) = 8 then 4x = 20 and x = 5