Question

2/y-15 = 3/5

Solve for y

Please teach me how to do this?

Answer 1

Isolate the y.
First add 15 to both sides and simplify the right
Then turn both sides upside down (that is, take the reciprocal)
multiply both sides by 2 to solve for y.

Answer 2

Okay! Thank you! I wasn't sure if I could just times by the 2 first.

Answer 3

you are welcome.
What did you get for y?

Answer 4

Hold on a sec..almost got it

Answer 5

31.2=y?

Answer 6

nevermind 25/3 my bad

Answer 7

Only y is in the denominator right? Not (y-15) right?

Answer 8

It's (y-15)

Answer 9

Oh then you should use parenthesis. Is this the equation?\[\Large \frac{ 2 }{ y-15} = \frac{ 3 }{ 5 }\]

Answer 10

Yes. Sorry haha

Answer 11

Then simply cross multiply:
2 * 5 = 3(y-15)
divide by 3
10/3 = y - 15
add 15
10/3 + 15 = y
10/3 + 45/3 = y
y = 55/3

Answer 12

Oh okay

Answer 13

alright. When writing math equations horizontally without an editor always make use of parenthesis to let others know whether the whole thing is in the denominator, exponent, etc.

Answer 14

Thank you so much :). I gotta go now though; I need to finish this homework soon :). Bye!

Answer 15

bye.