Fraction step explanation
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Fraction step explanation

[From: ] [author: ] [Date: 12-03-10] [Hit: ]
......
-1/2x = -1/4y - 21
-x = -1/2y - 42

where did the -1/2y and 42 come from?

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(1/2) is brought to the right side of the equation by multiplying both sides of the equation by 2.

(2)(-1/2)x = (2)(-1/4)y - (2)(21)
-1x = -1/2y - 42

(-1/4) * 2 = (-1/2) and 21 * (2) =42.

Hope this helps!
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