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Firlakuza [10]
3 years ago
7

If 3 is added to a number and the sum is multiplied by 3 the result is 7 times the number decreased by 9 find the numbers

Mathematics
1 answer:
Naya [18.7K]3 years ago
5 0

Answer:   \frac{9}{2}

<u>Step-by-step explanation:</u>

3(3 + x) = 7x - 9

 9 + 3x = 7x - 9     <em>distributed 3 on the left side</em>

<u>       -3x</u>  <u> -3x     </u>

 9       =  4x - 9

<u>+9      </u>     <u>      +9 </u>

18       =  4x

<u>÷4      </u>    <u>÷4      </u>

  \frac{9}{2}      =   x

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<u>✿</u><u>Answer:</u>

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✂----------------------

Let, number of wristbands = x

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5.50x+5.5y=165\\5.5x+8.75y=204\\---------\\-3.25y=-39

y=-39/3.25

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So, Both~ sold ~18 ~wristbands ~and ~12~ belts.

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<h3>hope it helps...</h3><h3>have a great day!!</h3>
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