CBSE Class 10 Answered
Hi Moksh,
Here are the steps for Substitution Method.
Step 1: Express the value of one variable, say y in terms of other variable, x from either equation, whichever is convenient.
Step 2: Substitute the value of y in other equation and reduce it to an equation in one variable, i.e. in terms of x.
There will three possibilities:
i. If reduced equation is linear in x, then solve it for x to get a unique solution.
ii. If reduced equation is a true statement without x, then system has infinite solutions
iii. If reduced equation is a false statement without x, then system has no solution.
Step 3: Substitute the value of x obtained in step 2, in the equation used in step 1, to obtain the value of y.
Step 4: The values of x and y so obtained are the coordinates of the solution of system of equations.
If you want to understand the steps of any other method, refer to the link below.
http://www.topperlearning.com/study/cbse/class-10/mathematics/revision-notes/pair-of-linear-equations-in-2-variables/b101c2s3e21ch82