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Rufina [12.5K]
3 years ago
10

Use elimination to solve the system of equations

Mathematics
1 answer:
Phantasy [73]3 years ago
6 0

Answer:

A (-5,2)

Step-by-step explanation:

5x+y=-23

7x-3y=-41

3×(5x+y)=3×(-23)

15x+3y=-69

<u>+</u><u>7x-3y</u><u>=</u><u>-41</u>

<u>22x</u>=<u>-110</u>

22. 22

x=-5

5x+y=-23

5(-5)+y=-23

-25+y=-23

<u>+25</u><u>.</u> <u>+25</u>

y=2

When using elimination you add both equations together so that one variable cancels out the other. In this situation, y can be the variable. You must get the y-variables to cancel out leaving just the x- variables to solve for.

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