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# How on earth ?

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can someone help me learn how figure out how to do questions like my last 2 posts?  It's these questions: -19y = -15 – 16y

May 10, 2017

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Sure!

-19y = -15 – 16y

First, add 16y to the left side and the right side.

-19y + 16y = -15 - 16y + 16y

This cancels out - 16y from the left, making it easier to solve.

-3y = -15y

Change both signs to a positive (Only if both sides are negative or already positive)

3y = 15

Divide by 3 on both sides.

3y/3 = 15/3

Solve.

y = 5

When you divide 3y by 3, it cancels out the three, because 3/3 is 1, and 1y = y.

May 10, 2017
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What if it has 4 numbers like this : 10m – 2 = 9m – 14

ItsTayha  May 10, 2017
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I will show you!

Jelly  May 10, 2017
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10m – 2 = 9m – 14

Subtract 9m from both sides.

10m - 9m – 2 = 9m - 9m – 14

Solve.

m - 2 = (-14)

Add 2 to both sides. (Do the opposite of the sign it shows. Negative = Positive. Times = Divide)

m - 2 + 2 = (-14) + 2

Solve.

m = (-12)

Always make sure m positive.

May 10, 2017
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Wow! I have keep reading that over till I know how to do it!

ItsTayha  May 10, 2017
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I am sure you will get it!

Just focus, and keep trying.

Jelly  May 10, 2017
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Yeah I might post more of those up, they are in a bio I have for math class

ItsTayha  May 10, 2017
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I will try to solve all the ones you do put up.

Just for the sake of doing math during school hours xD

Jelly  May 10, 2017
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My math teacher doesn't really help us out

ItsTayha  May 10, 2017
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That isn't a very good teacher =/

Jelly  May 10, 2017