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
1 answer:
Answer: 
<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>
= x
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Step-by-step explanation:
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x = 72
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Step-by-step explanation:
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