thgenfg2052 thgenfg2052

01-11-2018
Mathematics

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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

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tramserran tramserran

01-11-2018

Answer: [tex]\frac{9}{2}[/tex]

Step-by-step explanation:

3(3 + x) = 7x - 9

9 + 3x = 7x - 9 distributed 3 on the left side

-3x -3x

9 = 4x - 9

+9 +9

18 = 4x

÷4 ÷4

[tex]\frac{9}{2}[/tex] = x

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