Friday

January 30, 2015

January 30, 2015

Posted by **asia** on Thursday, January 21, 2010 at 10:58pm.

- math -
**ALan**, Thursday, January 21, 2010 at 11:20pmIsolate x or y in either equation and then subsitute it in to the other equation.

x+y=56

x=56-y

Subsitute into the other equation:

Since x=56-y, the other equation becomes (56-y)+3y=56

56+2y=56 subtract 56 from both sides

2y=0

y=0/2

y=0

then x must be 56

**Answer this Question**

**Related Questions**

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

algebra - i need help with these problems (either a solution or how to plug them...

MATH - SYSTEMS OF EQUATIONS CAN BE SOLVED BY GRAPHING OR BY USING SUBSTITUTION ...

math - Systems of equations can be solved by graphing or by using substitution ...

math - SYSTEMS OF EQUATIONS CAN BE SOLVED BY GRAPHING OR BY USING SUBSTITUTION ...

Math - Use the substitution method to find solution sets (x,y) for the following...

Math - When solving a system of equations, how do you determine which method to ...

quick question regarding equations - I know there are methods out there but what...

Algebra II - If you were to use the substitution method to solve the following ...

math - solve each system of equations by substitution. y=3x-9 please help ...