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Mathematics Middle School

3 less than 16 divided by a number s is 5

3 less than 16 divided by a number s is 5

2 months ago

Solution 1

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Guest #8786

2 months ago

3-16/a= 5
subtract 3-16
-13/a=5
multiply both sides by a
-13=5a
flip the equation
5a= -13
divide both sides by 5
a= -2.6

check the equation
3-16/-2.6=5
-13/-2.6=5
5=5

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Solution 1

D= # of dimes
q= # of quarters

QUANTITY EQUATION:
d + q= 64

COST EQUATION:
0.10d + 0.25q= $9.25

STEP 1:
multiply quantity equation by -0.10 to be able to eliminate the d term in step 2

(-0.10)(d + q)= (-0.10)(64)
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STEP 2:
add equation from step 1 to cost equation to eliminate the d term and solve for q

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Solution 1

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Solution 2

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Question

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Answer: $415+d\leq500$

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