Question

the sum of two number is 2490 and if 5% of phone number is equals to 85% of other than the number are​

Answer 1

x + y = 2490

5% of x = 85% of y

5x/100 = 85y/100

5x/100 - 85y/100 = 0

$\frac{5x - 85y}{100} = 0 \\ 5x - 85y = 0 \: equ \: (2) \\ multiply \: equ \: 1 \: with \: 5 \\ 5x + 5y = 12450 \\ (1) - (2) \\ 90y = 12450 \\ y = \frac{12450}{90} = 138.3 \\ substitute \: y\: in \: equ \: (1) \\ x + 138.3 = 2490 \\ x = 2490 - 138.3 \\ x = 2351.7$

x = 2351.7

y = 138.3