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

asked Jul 25, 2018 101k views

5 votes

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5 votes

plug 3x into the second equation and solve for x. then plug x into the first equation to solve for y.

Seif Hatem answered Jul 26, 2018

5.1k points

3 votes

x+3x=4

4x=4

x=1

y means 3x so 3 times1
y will be 3

Bilal Mustafa answered Jul 28, 2018

6.3k points

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