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avatar+55 

-10x +8y=-44

4x+8y=40

Solve for X and Y!!

 Feb 5, 2021

Best Answer 

 #1
avatar+73 
+2

you can subtract the two equations, like so:

 

4x+8y-(-10x+8y) = 40-(-44)

 

simplifying:

 

4x+8y+10x-8y = 40+44

14x = 84

x = 6

 

4(6)+8y = 40

24+8y = 40

8y = 40 - 24

8y = 16

y = 2

 

 

hope this helped! please correct me if i am wrong:)

 Feb 5, 2021
 #1
avatar+73 
+2
Best Answer

you can subtract the two equations, like so:

 

4x+8y-(-10x+8y) = 40-(-44)

 

simplifying:

 

4x+8y+10x-8y = 40+44

14x = 84

x = 6

 

4(6)+8y = 40

24+8y = 40

8y = 40 - 24

8y = 16

y = 2

 

 

hope this helped! please correct me if i am wrong:)

macar0ni Feb 5, 2021
 #2
avatar+22 
+2

-10x +8y=-44

4x+8y=40

 

First, let's subtract these two equations

 

If we do that we get:

 

-14x=-84

 

divide both sides by -14 

 

x=6

 

We can now plug in x=6 in either of the two equations. I'll plug it into the second one

 

4(6) + 8y = 40

24+8y=40

-24        -24

8y= 16

---    ----

8       8

 

Y=2

 Feb 5, 2021
edited by Nappe  Feb 5, 2021

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