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Mathematics 19 Online
OpenStudy (anonymous):

help with two 8th grade math questions! medal and fan reward! Thanks! question attached below.

OpenStudy (anonymous):

OpenStudy (anonymous):

help!

OpenStudy (anonymous):

@SiennaSurfer

OpenStudy (johnweldon1993):

For number 1 you have 3 and 4 mixed up

OpenStudy (anonymous):

so just switch those up?

OpenStudy (anonymous):

d and a?

OpenStudy (johnweldon1993):

You need to solve for the variable BEFORE you substitute it into the the other equation. So yes just switch D and A

OpenStudy (johnweldon1993):

And for number 2) x = 2y - 2, 3x - y = 14 So sub in x = 2y - 2 for 'x' in the second equation 3x - y = 14 becomes 3(2y - 2) - y = 14 distribute 6y - 6 - y = 14 Combine like terms 5y - 6 = 14 Add 6 to both sides 5y = 20 Divide both sides by 5 y = ?

OpenStudy (anonymous):

4

OpenStudy (anonymous):

so which one is my answer?

OpenStudy (johnweldon1993):

Well as you can see we solved y = 4 so that is your y variable in the ordered pair.. Now we solve for 'x'....plug 4 in for every 'y' you see in one equation and see what 'x' comes out to...

OpenStudy (anonymous):

6

OpenStudy (anonymous):

so its 6,4?

OpenStudy (johnweldon1993):

Correct!

OpenStudy (anonymous):

thanks!

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