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# Solve by substitution y equals -4x - 7 and y equals 3x?

Updated: 4/28/2022

Wiki User

13y ago

The easiest way to solve this system of equations is to solve for a variable in one of the equations. In the second equation, y = 3x. This can be substituted into the first equation:

y = -4x - 7;

3x = = -4x - 7;

7x = -7;

x = -1.

Since we have determined that x equals -1, we can then substitute -1 into either equation to find our corresponding y-value. Thus:

y = 3x;

y = 3(-1)

y = -3.

Thus, the solution to this system of equations is (-1, -3).

Wiki User

13y ago

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Q: Solve by substitution y equals -4x - 7 and y equals 3x?
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