Question

Solve the formula x-2y=15 for y

Answer 1

y = (1/2)x - (15/2)

Explanation:

goal: to rearrange the expression such that it is in the form

y = f(x); where f(x) is an expression in terms of x

given:

x - 2y = 15 (subtract x from both sides)

-2y = 15 - x (multiply both sides by -1 to make left side positive)

2y = -15 + x (divide both sides by 2 and rearrange)

y = (1/2)x - (15/2)