Question

How do you solve an indicated variable like 5y+2x=15 when y is the variable you need to solve for?

Answer 1

algebra everything else to one side ...

Answer 2

do you know how to solve an equation that has only 1 variable?

Answer 3

Yes I do. But I was wondering if I'm supposed to divide the 5 at the same time I divide the 2x

Answer 4

you cant really do two things at once here ... its just not that practical

tell me why you think you need to divide a 2x?

Answer 5

Well to solve for an indirect variable, you need to get that vaiable alone on one side. So if I was to get y on one side of the equal sign, then wouldn't I have to separate it from the 5 it's attached to? As well as the 2x? so the 5, 2x, and 15 would all some how equal y...

Answer 6

if we work this step by step, not necessarily in this order ... but this is good enough

5y + 2x = 15 , to get rid the +2x, we subtract 2x from each side
- 2x -2x
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5y + 0x = 15 - 2x , simplfy the zero part


5y = 15 - 2x , now that we have a single term in y, we can now divide off that 5
/5 /5
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1y = (15-2x)/5


y = (15-2x)/5 , and simplfy to your hearts content

Answer 7

oh wow, I COMPLETELY forgot that we had to do the opposite operation... so I was going to divide the 2x. Ugh first day of school review packet of something I did over 2 years ago without going over any of it isn't the best idea. why they put algebra 1, then geometry, then algebra 2 in that order, I'll never know. thanks for the help!

Answer 8

:) good luck