Question

x - 2y = 0 and 3x + 4y = 20​

Answer 1

Step-by-step explanation:

$(x - 2y = 0) \times 2$

$2x - 4y = 0$

by method of elimination

2x-4y=0

3x+4y=20

__________

5x=20

x=20/5=4

3(4)+4y=20

12+4y=20

4y=8

y=2

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Answer 2

Answer:

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Step-by-step explanation:

Qus is incomplete

x - 2y = 0                                             3x + 4y = 20

x = 0     2     4     6                          x = 0     4      8      12

y = 0     1      2     3                          y = 5     2     -1       -4

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or,

x- 2y = 0

2y = x

4y = 2x

3x + 4y = 20​        

5x = 20

x = 4, y = 2