I need some step my step notes on how to solve systems of equations like this for example

System of equations:

• Equation 1

• Equation 2

Procedure

This system is easier if we solve it using the elimination method, in which we multiply the first equation times minus one, add both equations to eliminate the x variable, and solve for y.

0. Multiplying Equation 1 times minus 1.

2. Adding both equations:

Then:

3. Finally, substituting this value in any equation and solving for x:

y = 9 and x = -5.

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