Question

find the value of x+y,if 3x+4y=11,4x+3y=10​

Answer 1

Answer:

Let's do this question by elimination method

Let x be 2 and y be 1

3x + 4y = 11

3 × 2 + 4 × 1 = 11

6 + 4 ≠ 11

Let x be 1 and y be 2

3x + 4y = 11

3 × 1 + 4 × 2 = 11

3 + 8 = 11     (For finding x and y we must prove both the equations and  

                   one equation has been proved)

4x + 3y = 10

4 × 1 + 3 × 2 = 10

4 + 6 = 10

So, both of the equations being proved, we have found out the answer.

X = 1

Y = 2

Step-by-step explanation:

Answer 2

This answer is for one mark question.