Question

2x-3y=2 and x+2y=8 substitution method

Answer 1

Answer:

from 2

x=8-2y

put in 1

2(8-2y)-3y=2

or 16-4y-3y=2

or 7y=14

or y=14/7=2

put in x=8-2y

x=8-2*2

or x=4

Therefore x-y=4-2=2

Answer 2

Answer:

x=2,y=2

Step-by-step explanation:

follow these steps for substitution method

2x-2y=2 is (i)equation

x+2y=8 is (ii)equation

x=8-2y put this in (i)equation

2(8-2y)-2y=2

16-4y-2y=2

16-7y=2

-7y=2-16

-7y= -14

y=2 put in (ii) equation

x+2×2=8

x=8-4=4

x=4,y=2