Question

substitution method x+2y+1=0and 2x -3y-12=0 ​

Answer 1

x+2y+1=0----------(1

2x -3y-12=0 --------(2

from 1.

x=1-2y

from(2)

2(1-2y)-3y -12= 0

=> 2-4y -3y-12=0

=> -7y= 10

=> y=-10/7

substituting value of y we get:

x= 1-2× -10/7 =1 + 20/7 = 27/7

=>x= 27/7