1.

1/5 of a number exceeds 1/7 of the same number by 10. the number is

Answer»

1/5 of a NUMBER = 1/5 of x = x/5

1/7 of a number = 1/7 of x = x/7

x/5 EXCEEDS x/7 by 10 = x/5 +10

according to the sum 

x/5 +10 = x/7

x/5-x/7 = -10

7x-5x /35 = -10

2x / 35 = -10

2x = -10 *35

x = -10*35 / 2

x= -350 /2

x = -175



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