Question

the sum of a number and 4 times itself is 80.what is the number

Answer 1

4(8 + x) = 80

Distribution property

32 + 4x = 80

subtract 32 from both sides

32 - 32 + 4x = 80 - 32

4x = 48

Divide both sides by 4

x = 12

Check

8 + 12 = 20 is the sum

4 x 20 = 80 4 times the sum

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Answer 2

Hey Friend ☺

Let the number be x

The sum of a number and 4 times itself is 80 .

So we get equation,

x + 4x = 80

》5x = 80

》x = 80/5

》x = 16

So the required number is 16 .

Hope it helps you ..!!

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