Math

3 is added to five times a number and the result is multiplied by 4 .The final result is 72 .What is the number.

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  1. (5n + 3) * 4 = 72

    solve for n

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  2. 15n+12=72
    15n=72-12
    15n=60
    n=60/15
    n=4

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  3. 4*5x=20x instead of 15x

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  4. 4(3+5×)=72
    12+20×=72
    20×=72-12
    20×=60
    ×=60/20
    ×=3

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  5. y=3

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  6. 20n+ 12= 72
    20n= 72 - 12
    20/20 = 60/ 20
    1= 3
    n = 3

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