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Best Answer
15X - 10 = - 9X + 2
add 9X to both sides
15X + 9X - 10 = - 9X + 9X +2
24X - 10 = 2
add 10 to each side
24X - 10 + 10 = 2 + 10
24X = 12
divide each sides integer by 24
(24/24)X = 12/24
X = 1/2
------------check in original equation
15(1/2) - 10 = - 9(1/2) + 2
15/2 - 10 = - 9/2 + 2
Now, 10 is 20/2 and 2 is 4/2
15/2 - 20/2 = - 9/2 + 4/2
- 5/2 = - 5/2
---------------------checks
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