Friday

January 30, 2015

January 30, 2015

Posted by **Anonymous** on Tuesday, January 22, 2013 at 11:09pm.

(1/2x)+(3/4y)=(-1/4) and (3/4x)-(1/4y)=1

Can you please help?

- Pre-Calculus -
**Steve**, Wednesday, January 23, 2013 at 1:01pmfirst, I'd get rid of those pesky fractions:

2x + 3y = -1

3x - y = 4

Now you can see that y = 3x-4, so substitute that back in the 1st equation:

2x + 3(3x-4) = -1

2x+9x-12 = -1

11x = 11

x = 1

so, y=3x-4 = -1

be sure to check that the answer fits the original equations.

- Pre-Calculus -
**Caroline**, Thursday, January 24, 2013 at 1:14amThank you.

**Answer this Question**

**Related Questions**

Pre-Calculus - I have to use the substitution method to solve the system of ...

Substitution Method-Plz help - Use the Substitution method to solve the system ...

substitution method - Solve by substitution method please help me solve this. I ...

Algebra 1 - bobpursey, In this problem you helped me with earlier: Solve using ...

Linear Equations - Can you please help solve this equation using the ...

Algebra II - How do you solve the linear equations x+y=5 3x-y=3 by use of the ...

Pre-Calc - Solve the system of equations using either the substitution method or...

algebra - use the Substitution Method. Please give it a try. y = 3x + 4 5x + 3y...

math substitution method - use the substitution method to solve 7x+5y=-26 x=28-...

Substitution Method - Use the Substitution method to solve the system of ...