Question

2x+5y=1 ; 7x-y=22 elimination method​

Answer 1

Step-by-step explanation:

The answer is given in the attachment.

Answer 2

Answer:

x=111/37

&

y=-1

Step-by-step explanation:

1. 2x+5y=1;
2. 7x-y=22;

Equation 2 multiply by 5;

5(7x-y=22);

3. 35x-5y=110;

Now, Addition of Eqn.3 and Eqn.1;

Let's:

35x -5y =110

35x -5y =110+

35x -5y =110+ 2x +5y =1

35x -5y =110+ 2x +5y =1 ___________

35x -5y =110+ 2x +5y =1 ___________ 37x +0 =111

x= 11/37

Now, Let's see Y of in that Eqn.1,

put Value of X in Equation 1;

2x+5y= 1;

2x+5y= 1;2(111/37)+5y =1;. (x=11/37)

222/37+5y =1;

222/37+5y =1;(222/37)-1= -5y;

222/37+5y =1;(222/37)-1= -5y;222-37/37= -5y;

222/37+5y =1;(222/37)-1= -5y;222-37/37= -5y;5y= -222+37/37;

222/37+5y =1;(222/37)-1= -5y;222-37/37= -5y;5y= -222+37/37;5y= -185/37;

222/37+5y =1;(222/37)-1= -5y;222-37/37= -5y;5y= -222+37/37;5y= -185/37;y=(-185/37)1/5

222/37+5y =1;(222/37)-1= -5y;222-37/37= -5y;5y= -222+37/37;5y= -185/37;y=(-185/37)1/5y=-185/185;

y= -1