Question

What does the equation become when one variable is eliminated from the system of equations below?
2x+4y=6
x-4y=2
a.x=3
b.-3x=-3
c.3x=8
d.6x=6

Answer 1

2x+4y=6 --->Equation 1
x-4y=2 -->Equation 2

Now tell me what you get when you add Equation 1 and Equation 2??

Answer 2

youll get 3x+8y=8

Answer 3

Tell me one thing
What is
4 + (-4)=?

Answer 4

it equals 0

Answer 5

Yes. Then how did you get 8y on adding equation 1 and equation 2??

Answer 6

i added 4 and 4,my mistake.

Answer 7

im thinking it c?

Answer 8

Absolutely right :)

Answer 9

Thanks Friend =)

Answer 10

Welcome :)