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  • Solve the following pair of linear equations: (ii) ax + by = c bx + ay = 11 + c

Q7.    Solve the following pair of linear equations:

                (ii)    \\ax + by = c\\ bx +ay = 1 + c

Answers (1)

best_answer

Given Two equations, 

\\ax + by = c.........(1)\\ bx +ay = 1 + c.........(2)

Now By Cross multiplication method,

\frac{x}{b_1c_2-b_2c_1}=\frac{y}{c_1a_2-c_2a_1}=\frac{1}{a_1b_2-a_2b_1}

\frac{x}{(b)(-1-c)-(-c)(a)}=\frac{y}{(-c)(b)-(a)(-1-c)}=\frac{1}{(a)(a)-(b)(b)}

\frac{x}{-b-bc+ac}=\frac{y}{-cb+a+ac}=\frac{1}{a^2-b^2}

x=\frac{-b-bc+ac}{a^2-b^2},\:and\:y=\frac{a-bc+ac}{a^2-b^2}

Posted by

Pankaj Sanodiya

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