1) Substitution Method- Let us try to understand this method with a simple example
As the name suggests we are required to substitute `x=8-y` in eq2
`-2y= -2-8= -10`
`y=5` and `x+5=8`
Shaalaa.com | Pair of Linear Equation in two variable part 9 (Algebraic Substitution)
A three digit number is equal to 17 times the sum of its digits. If 198 is added to the number, the digits are interchanged. The addition of first and third digit is 1 less than middle digit. Find the number.