Andrew M. answered • 02/28/17

Tutor

New to Wyzant
Mathematics - Algebra a Specialty / F.I.T. Grad - B.S. w/Honors

x= # $.20 coins

y = # $2.00 coins

x + y =27

.2x + 2y = 23.4

multiply equation 1 by -2 and add

the equations

-2x -2y = -54

.2x + 2y = 23.4

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-1.8x = -30.6

Now just solve for x to find the number

of $.20 coins. Then 27-x will be the

number of $2.00 coins