Question

X+2y=1,3x-y=17 solve

Answer 1

Answer:

x+2y=1.......(1)

3x-y=17.......(2)

using subtraction method

Step-by-step explanation:

when we multiply eq 1 with 3 we get 3x+ 6y=3 now subtract this eq with eq 2

x will get cancel and you left with one variable i.e y and not you have

6y=3 and - y= 17

and you get

7y=14

y=14/7

y=2

put the value of y in eq 2 and you get x

x+(2)2=1

x+4=1

x=-3

Answer 2

Answer:

x = 5

y = -2

Step-by-step explanation:

x + 2y = 1 ............... eq1

3x - y = 17 ...............eq2

Multiple eq2 by 2 to equalize the value of y

2 ( 3x - y ) = 17 *2

6x - 2y = 34 ............ eq3

Now, add eq1 to eq3

6x - 2y = 34

x + 2y = 01

7x = 35

.°. x = 35/7 = 5

Substitute x= 5 in eq 1

5 + 2y = 1

2y = 1 - 5

2y = - 4

y = -4/2 = -2