OpenStudy (anonymous):

How would i solve this using substitution: 2x=6y 4y+x=20

2 years ago
OpenStudy (anonymous):

Solve for one of the variables in the first equation (since that looks easiest) and then plug that into the place where the variable is in the other. Like so.

2 years ago
OpenStudy (anonymous):

Would x equal 1/3

2 years ago
OpenStudy (anonymous):

In the first? It would equal 3y.

2 years ago
OpenStudy (anonymous):

Oh yeah

2 years ago
OpenStudy (anonymous):

So plug in 3y for x in the second one and solve for 'y'.

2 years ago
OpenStudy (anonymous):

So 7y=20?

2 years ago
OpenStudy (anonymous):

You got it!

2 years ago
OpenStudy (anonymous):

So y = ?

2 years ago
OpenStudy (anonymous):

y=2.86

2 years ago
OpenStudy (anonymous):

or y=7/20

2 years ago
OpenStudy (anonymous):

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2 years ago