SOLUTION: Solve each system of equations by using substitution 1. 3x + 7y = 19 x+y=5 2. x+3y = 12 5x+y = 4

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Question 471513: Solve each system of equations by using substitution
1. 3x + 7y = 19
x+y=5
2. x+3y = 12
5x+y = 4
Answer by jorel1380(3719) About Me  (Show Source):
You can put this solution on YOUR website!
3x + 7y = 19
x+y=5
x=5-y
3(5-y)+7y=19
15-3y+7y=19
4y=4
y=1
x=4
--------------------
x+3y = 12
5x+y = 4
x=12-3y
5(12-3y)+y=4
60-15y+y=4
14y=56
y=4
x=0..