Question

sammikran x-2y=0,3x+4y=20​

Answer 1

Answer:

Given:

x-2y=0

3x+4y=20

We need to find the values of x and y

x-2y=0 ————-(i)

3x+4y=20————-(ii)

Multiplying Equation (i) by 2 we get

2x-2y=0———–(iii)

Solving equations (ii) and (iii) we get,

3x+4y=20

2x-4y=0

_________

5x=20

x=5

Substituting the value of x in equation (i) we get,

5-2y=0

-2y=-5

2y=5

y=5/2

Hence x= 5 and y = 5/2

Answer 2

x-2y=0.....eq(1)

3x+4y=20....eq(2)

From eq.1

x=2y....(give in eq.2)

Then,

3(2y)+4y=20

6y+4y=20

10y=20

y=2

Here,we have y=2

x=2y

x=2(2)

x=4

Therefore,x=4 and y=2....