221,071 views
45 votes
45 votes
Solve the system of equations by substitution x+y=4 y=3x

User Brian Kessler
by
2.5k points

1 Answer

10 votes
10 votes

Answer:

x=1

Explanation:

x+y=4

replace y with 3x

x+3x=4

then add the x which is 1x plus 3x

4x=4

then divide 4 on both sides

4x/4=4/4

and your answer is 1

User Bunny
by
2.1k points