Answer:
By using linear equation
Step-by-step explanation:
a+b=515......Equation 1
a-b=475.........Equation 2
From equation 1
a=515-b
Putting value of a in Equation 2
515-b - b=475
515- 2b=475
515-475=2b
2b=515-475
2b=40
b=40/2
b= 20
Putting b=20 in Equation 1
a+20=515
a=515-20
a= 495
a=495
b= 20
Check whether equation hold true
a+b=515
495+20=515
a-b= 475
495-20=475
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