Question

Y=5x+4 and 3x+2y=20 by using elimination​

Answer 1

Explanation:

y = 5x + 4

-5x + y = 4 ----------------------(i)

3x + 2y = 20 --------------------(ii)

Multiply equation (i) by (-2)

(i)* (-2) 10x - 2y = -8

(ii) 3x + 2y = 20 { Now add this two equations}

13x = 12 { -2y and 2y got eliminated}

x = 12/13

Plug in value of x in (i)

-5*12/13 + y = 4

-60/13 + y = 4

y = 4 + 60/13

`y=(4*13)/(1*13)+(60)/(13)\\\\=(52)/(13)+(60)/(13)\\\\=(112)/(13)\\\\=8(8)/(13)y=`