SOLUTION: If y varies directly as x, and y is 56 when x is 21, find y when x is 74.

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Question 1171038: If y varies directly as x, and y is 56 when x is 21, find y when x is 74.
Answer by MathLover1(20849) About Me  (Show Source):
You can put this solution on YOUR website!

If y+varies directly as x, then
y=kx
and if y is 56 when x is+21,then
56=k%2A21
k=56%2F21
k=8%2F3
your equation is:
y=%288%2F3%29x

find y+when x is 74:

y=%288%2F3%2974
y=592%2F3-> exact solution