Asked by Adriana

I need help on how to solve equations with variables on both sides.

1. 30=8 - 2x
2. 98 - 4b= -11b
3. 3p - 8= 13 - 4p
4. 9 - 2y/7 = y
5. 1/3(12 - 6x) = 4 - 2x
Answered by drwls
Add, subtract, multiply or divide both sides of the equation by the same amount unitl you get only the variable you want on one side. That is all there is to it.

For example:
30 = 8 - 2x
22 = -2x
-22 = 2x
x = -11


You should be able to do the others yourself
Answered by Adriana
How would you go about solving this one, though: 3p - 8= 13 - 4p
Would you subtract the 13 from the 8 first and then add 4p to the 3p?
Answered by Ms. Sue
3p - 8= 13 - 4p

You would first add 8 to both sides of the equation.

3p = 21 - 4p

Then add 4p to both sides.

7p = 21
p = ?
Answered by Ms. Sue
Substitute the answer for p in your original equation. Did you get the correct answer?
Answered by Adriana
So p = 3. I understand now. Thank you!
Answered by Ms. Sue
Great! You're welcome. :-)
Answered by Anonymous
Y.12 Solve equations with variables on both sides
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