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Solve the following system of equations: y=x+4 2x+y=13
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1 vote
Solve the following system of equations: y=x+4 2x+y=13

User Davidoff
by
8.3k points

2 Answers

1 vote
Substitute y from the first equation into the second:

2x+(x+4)=13
3x+4=13
3x=9
x=3.
User JingJingTao
by
8.1k points
7 votes
Okay, for this one is will use substitution:
y=x+4
y-x=4
2y-2x=8

-2x+2y=8
+
2x+y=13
=
3y=21
y=7
x=3 is your final answer. Hope it help!
User JSF
by
8.2k points
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