Question

Solve : 3x – 4y = 10; 4x – 3y = 11
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Answer 1

Answer:

x=2, y=-1

Step-by-step explanation:

3x-4y=10

4x-3y=11

(3x-4y=10)3

(4x-3y=44)4

9x-12y=30

16x-12y=44

by multiplying eq 2 by - and cancel the both equation

Answer 2

since if we solve both the equations we get same answer so we can assume that both the equations are equal

3x-4y=4x-3y

send x terms to LHS and y terms to RHS

3x-4x=-3y-4y

-x=-y

x=y