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Mathematics 18 Online
OpenStudy (erniellyd28):

4x+7y=28

OpenStudy (erniellyd28):

solve for y

OpenStudy (fortytherapper):

We want to put everything with a y on one side of the equal sign and everything else on the other side

OpenStudy (erniellyd28):

so do i have to subtract anything to do this

OpenStudy (marsxtc):

Yes you have to subtract the 4x over.

OpenStudy (erniellyd28):

4x+7y=28 4x-4x+28=4x+28

OpenStudy (erniellyd28):

please tell me im right?

OpenStudy (erniellyd28):

so far

OpenStudy (marsxtc):

You minus 4x on both sides so it would be 7y = 28-4x

OpenStudy (erniellyd28):

darn it i thought i had it

OpenStudy (erniellyd28):

sorry

OpenStudy (marsxtc):

Do you know what to do after reaching 7y = 28-4x?

OpenStudy (erniellyd28):

subtract 28-4x?

OpenStudy (marsxtc):

Divide both sides by 7.

OpenStudy (marsxtc):

You have to isolate the y

OpenStudy (erniellyd28):

so would it be 4x/4- 4x-21/7?

OpenStudy (erniellyd28):

im guessing not lol

OpenStudy (marsxtc):

28/7 - 4x/7 = 4 - 4x/7

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