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What is the first step to solve the following system of equations using substitution?

x - y = 7
2x - y = 17

1 Answer

8 votes

Answer:

Solve one of the following equations for x or y and then substitute the answer to that equation into the second equation.

Explanation:

Given the system of equations:


x-y=7


2x-y=17

You could solve either one of the given equations but for this question we will solve the first equation.


x-y=7

Solve for x

Subtract y


x=5-y

Now substitute the answer for the first equation into the second equation.

Hope this helps.

User SidK
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