3 years ago

The product of 9 and a number is 12 less than three times that number. What is the number?

1 answer:

5 0

So let me give you the answer with procedure so that you can understand it better:
Let x = Number

Product of 9 and Number:
9x 
is 12 less than 3 times that number. So: 
3x - 12 
Set them equal and solve for x like this:
9x = 3x - 12 
6x = -12 
x = -2
I hope this is very useful for you

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4 years ago

Sally has six more 34 cent stamps than 52 cent stamps. If her stamps amount to 11.50 how many of each stamp does she have?

Yuliya22 [10]

Let x be the number of 52 cent stamps that Sally has and let y be the number of 34 cent stamps that she has.

Then,

52x + 34y = 1150 --- (1)

Also, she has six more 34 cent stamps than 52 cent stamps.

Therefore, y = x + 6

(1) becomes

52x + 34(x + 6) = 1150

52x + 34x + 204 = 1150

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86x = 1150 - 204

86x = 946

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Hence, Sally has eleven 52 cent stamps and seventeen 34 cent stamps.

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3 years ago

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3 years ago

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Ksenya-84 [330]

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3 years ago

Consider the quadratic equation below. 4x^2-5=3x+4 Determine the correct set-up for solving the equation using the quadratic for

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