5x+4y= 10
–5x+y = 15

Answers

Answer 1

Answer:

x,y

-2,5

Explanation:

we want to get the variable alone so we need one

so since for the x the value is the same we would have to take away that one to stay with the y value

so since one of the value for x is negative we need to add

so 5x + -5= 0

so now we add 4y+y and that is 5y

and then 10+ 15 and that is 25

now this is our new equation --> 5y=25

now to get the y isolated, we need to divide by 5 on both sides

and so 5y/5=25/5

and we get

y=5

now since we have the answer for y we need to substitute it to find the value for x

-5x +y=15

since we know what y is we need to substitute

-5x+5=15

so now we subtract 5 on both sides since it the opposite of adding

-5x-5-5=15-5

now we have

-5x=10

now we divide by -5 to get the x isolated

-5x/-5=10/-5

nd the answer is

x=-2

hope this helped:D


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