Question

solve 2 X + 3 Y equal to 10 and X + 3 y = 9 by using substitution method

Answer 1

I hope helpful for you

Answer 2

2x+3y=10 =) y=(10-2x)/3-----1)
So substitute y in the equation x+3y=9---2)
Now x+3[(10-2x)/3]=9
x+10-2x=9
1=x

Now y=(10-2x)/3
y=(8/3)