Question

solve this in substitution way 3x+2y=9 and -2y+y=4

Answer 1

have you solved the previous problem?

Answer 2

yes.it actually work but finding LCD

Answer 3

what LCD?

Answer 4

-2y+y=4
-y=4
y=-4

3x+2(-4)=9
3x-8=9
3x=1
x=1/3

Answer 5

OUR teacher said that we have to find the LCD (least common denominator )

Answer 6

Actually, you don't need to find any LCDs because first: there are no fractions to simplify then second, you can simply get the value of one variable and substitute it to the other. It's that simple.

Answer 7

okey.thanks