Question

i mean 7y+15=3x

Answer 1

it does not have solution, you need to have at least two simultaneous equations to find values of two unknowns, right?

Answer 2

angelab,do you mean to find y in terms of x ?
if the question is that than the answer is y = [3*(x-5)] / 7
if not,oktal is right,it can't be calculated.

Answer 3

This could be a line whose slope is 3/7 and whose y intercept is -15/7