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Romashka [77]
3 years ago
7

What is the answer to 4x-5y=-12 -x+5y=18

Mathematics
2 answers:
Radda [10]3 years ago
5 0
The answer is (2,4), my work :
Lorico [155]3 years ago
3 0

4x-5y=-12

-x+5y=18

find x first by eliminating y

add both of the equations

4x+-x-5y+5y=-12+18

4x-x=-12+18

3x=-12+18

3x=6

divide both sides by 3 to get x by itself

3x/3=6/3

x=2

find y by using the substitution method

-x+5y=18

-2+5y=18

move -2 to the other side

-2+2+5y=18+2

5y=20

divide both sides by 5 to get y by itself

5y/5=20/5

y=4

Answer:

(2,4)

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