Question

Solve the formula for the indicated variable

rx + ry = 4 for r

Answer 1

r = 4/(x+y)

Explanation:

rx + ry = 4

Factor out r

r ( x+y) = 4

Divide each side by (x+y)

r ( x+y) /(x+y) = 4/(x+y)

r = 4/(x+y)