Question

3x-2y=4 9x-2y=7 By substitution method

Answer 1

hey dear sweet friend here is your answer

3x-2y=4
3x-y=2. ...........(4/2)
x-y=2/3
x=2/3y. --------(1)

now put the value

3(2/3+y)-2y=4
6/3+3y-2y=4
2+3y-2y=4
y+2=4
y=4-2.
y=2. -------(2)

now question number 2..

put the value on that equation

9x-2y=7

9(2/3+y)-2(2)=7
9(2/3)+2)-2(2)=7
18/3+2-4=7
6+2-4-7=0
8-11=0
-3

is your answer hope it's help you