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How to solve this using substitution. Y=3x and x+y=4

How to solve this using substitution. Y=3x and x+y=4
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5 votes
How to solve this using substitution. Y=3x and x+y=4

User Alireza Yazdandoost
by
8.9k points

2 Answers

5 votes
plug 3x into the second equation and solve for x. then plug x into the first equation to solve for y.
User Seif Hatem
by
7.1k points
3 votes
x+3x=4

4x=4

x=1

y means 3x so 3 times1
y will be 3
User Bilal Mustafa
by
8.7k points
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