What is the solution to this equation 5x=-60 A. x=65 B. x=12 C. x=-65 D. x=-12

Mathematics

1 answer:

julia-pushkina [17]3 years ago

8 0

Answer:

x = -12 so it's D

Step-by-step explanation:

you divided -60 by 5 and get -12

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ANSWER: 32 five-dollar bills

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EXPLANATION:

Let x be number of $5 bills

Let y be number of $10 bills

Since we have total of 38 bills, we must have the sum of x and y be 38

x + y = 38 (I)

Since the total amount deposited is $220, we must have the sum of 5x and 10y be 220 (x and y are just the "number of" their respective bills, so we multiply them by their value to get the total value):

5x + 10y = 220 (II)

System of equations:

$\left\{ \begin{aligned} x + y &= 38 && \text{(I)} \\ 5x + 10y &= 220 && \text{(II)} \end{aligned} \right.$