# 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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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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