Question

If 3x+4y=4 and 2x+y=1, then the value of 2x+3y is equal to

Answer 1

3.

Explanation:

3x + 4y = 4..........1

2x + y = 1.............2 Multiply this by 4:

8x + 4y = 4 Subtract this from equation 1:

-5x = 0

x = 0.

So substituting in equation 2:

2(0) + y = 1

y = 1.

Therefore 2x + 3y = 2(0) + 3(1) = 3.