2 years ago

Karen has $0.90 in dimes, d, and nickels, n. She has

Mathematics

1 answer:

kumpel [21]2 years ago

3 0

Why does Karen need to know this. Karen is supposed to be at the managers office!

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BigorU [14]

3x + 4y = 16
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4( 3x + 4y = 16)
3( -4x - 3y = -19)
Distribute
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Now subtract both equations
7y = 7
/7 on both sides
y = 1

Substitute y = 1 in one of the equations.
3x + 4y = 16
3x + 4(1) = 16
-4 on both sides
3x = 12
/3 on both sides
x = 4

Answer:
x = 4
y = 1

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