How do I do this.?(Math.)
posted by Margie .
Use the Substitution method to solve the system of equations.
y  2x = 5
3y  x = 5
Solve one of the equations for x or y.
Let's solve the first one for y:
y  2x = 5
y = 2x  5
Now let's substitute 2x  5 for y in the second equation to solve for x:
3(2x  5)  x = 5
6x  15  x = 5
5x  15 = 5
5x = 20
x = 4
Substitute 4 for x in either equation to solve for y. Let's choose the first one.
y  2(4) = 5
y  8 = 5
y = 3
There you have it! Check the solution with both equations to make sure we have the right solutions. It always helps to check your work!
I hope this will help.
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