Question

6x-2y=156.......(1)
X - y=18.........(2)
(1)-2×(2 )
How will you go about it​

Answer 1

Explanation:

(1) 6x-2y=156

2×(2) ; 2(x-y=18)

;2x-2y=36

from (1)-2×(2)

is 6x-2y=156 -

2x-2y=36

4x=120

x=30

from (2)

x-y=18

x-18=y

y=30-18

y=12

Answer 2

Plug in equation 1 and 2 into the formula: 156-2*18=