Question

if 10 be added to four times a certain number the result is 5 less than 5 times the number find the number

Answer 1

Let the unknown no. be x
then,
10+ 4x=5x-5
10+5=5x-4x
15 = x
x= 15

Answer 2

Let no. be X

4x + 10 = 5x - 5

x = 15

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