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Solve the system by substitution.7x—3y=8 y=3x

User Lara
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2 Answers

12 votes
12 votes

Answer:

1) 7x—3y=8

2) y=3x​

Explanation:

User Lucjan Grzesik
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30 votes
30 votes

According to the given data we have the following system of equation:

1) 7x—3y=8

2) y=3x​

Therefore, in order to solve the system by substitution, we would substitute the variable y of the first system of equation with the variable y=3x​.

So:

7x—3y=8

=7x -3(3x)=8

=7x -9x=8

-2x=8

x=8/-2

x=-4

So, if x=-4, then y would be calculated as follows:

y=3(-4)

y=-12

Therefore, the values of x and y would be x=-4 and y=-12

User Jonatan Anauati
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