Question

4. On comparing the ratios of the coefficients, find out whether the pair of equations x - 2y = 0 and 3x + 4y - 20 = 0 is
consistent or inconsistent .

Answer 1

Answer:

x-2y=0 [ 1]

3x+4y= 20 [2]

multiply (x-2y=0) by 2

2x-4y=0

adding two equation

2x-4y=0

+3x+4y=20

5x=20

x=20/5

x=4

put x=4 in equation 2

3×4+4y=20

12+4y=20

4y=20-12

4y=8

y=8/4

y=2