# Math

posted by .

1/2x - 1/4y= 7/2
3/4x + 1/3y= 19/2

To change into y=, do i also multiply by 1/2 and -1/2?

• Math -

on the first, multiply by -4, the second I would multlply by 3.

• Math -

well when i do the intersection i am getting, (170,-354), which is not one of my answers.

## Similar Questions

1. ### Math, rational inequalities

Please can someone help me solve this problem?
2. ### math, Jay

How do these fractions turn into the following fractions. 1/3=10/30 1/5=6/30 1/10=3/30 There is a fundamental fact of math that says if you multiply anything by one , nothing changes. but 1 = 3/3 = 10/10 etc. So if you have a fraction, …
3. ### math

how do you multiply intergers EX..... -4 x 5 = -20 4 x 5 = 20 right?
4. ### math

how do i change 3.75 into a fraction simple or improper fraction?
5. ### math

1/2x - 1/4y= 7/2 3/4x + 1/3y= 19/2 To change into y=, do i multiply the top one by by 1/4 and the bottom one by -1/3?
6. ### MATH!

1/2x - 1/4y= 7/2 3/4x + 1/3y= 19/2 To change into y=, do i multiply the top one by by 1/4 and the bottom one by -1/3?
7. ### chemistry

How to calculate enthalpy change of the following reaction?
8. ### math

1. change to improper fraction: 9 5/9 2. change to improper fraction: 6 23/39 3. change the improper fraction to a whole number:115/20 4. multiply 4 3/4 x 1 1/7 5,subtract- 20 11/15- 17 1/3 6 2(-6)(-8)(0)(-5): multiply 7. solve for …
9. ### Chemistry

When an electric current passes through water during the process of electrolysis, two gases are formed. One gas has a boiling point of -183 C and the other has a boiling point of -253 C. Has a physical change or chemical change occurred?
10. ### math

explain and demonstrate how to change 4/20 into a percent there are two ways we can work this out 4/20 times by 5 overall to get it out of 100, becomes 20/100. or you can do 4/20 then times that by 10 or 20 x what = 100?

More Similar Questions