Posted by Bre on Friday, January 20, 2012 at 4:37pm.
Solve by the substitution method. What is the solution of the system?
3x+9y=48
6x+y=56

math  Steve, Friday, January 20, 2012 at 11:51pm
To use the substitution method, you solve one equation for x, and then substitute that expression for x in the other equation. or, you can solve for y if it's easier.
3x + 9y = 48
3x = 48  97
x = 16  3y
6x + y = 56
6(163y) + y = 56
96 + 19y = 56
19y = 152
y = 8
so,
x = 16  24 = 8
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