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Mathematics 15 Online
OpenStudy (anonymous):

2x+3y=6 3x-y=-13, solve by any method (substitution, elimination)

OpenStudy (eyust707):

are you already familiar with one of the methods?

OpenStudy (anonymous):

not really

OpenStudy (eyust707):

okay so the idea is to find an x value and a y value that works for both of them

OpenStudy (anonymous):

which one is faster?

OpenStudy (anonymous):

yes

OpenStudy (eyust707):

the fastest way is to take your time on your first few.. learn them really good then you can do them without asking and you dont have to wait for an answer

OpenStudy (eyust707):

so check it out

OpenStudy (anonymous):

ok

OpenStudy (eyust707):

im going to teach you substitution because you will use it more often than not

OpenStudy (anonymous):

ok

OpenStudy (eyust707):

what we want to do is take one equation and mess around with it so that its equal to y

OpenStudy (anonymous):

can u please show me step by step :)

OpenStudy (eyust707):

lets do the second one because it will be easiest

OpenStudy (anonymous):

ok

OpenStudy (eyust707):

|dw:1340082680477:dw|

OpenStudy (eyust707):

we want to make that look like y = .......

OpenStudy (eyust707):

so first subtract 3x from both sides

OpenStudy (eyust707):

|dw:1340082733777:dw|

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