How do you solve: 5y - 2 = 2y + 19?

1 Answer
smendyka
Jan 14, 2017

See full solution process below:

Explanation:

First we need to add and subtract the necessary terms from each side of the equation to isolate the y terms on one side of the equation and the constants on the other side of the equation while keeping the equation balanced:

5y - 2 - color(red)(2y) + color(blue)(2) = 2y + 19 - color(red)(2y) + color(blue)(2)

5y - color(red)(2y) - 2 + color(blue)(2) = 2y - color(red)(2y) + 19 + color(blue)(2)

(5 - 2)y - 0 = 0 + 21

3y = 21

We can now divide each side of the equation by color(red)(3) to solve for y while keeping the equation balanced:

(3y)/color(red)(3) = 21/color(red)(3)

(color(red)(cancel(color(black)(3)))y)/cancel(color(red)(3)) = 7

y = 7

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