Question

substitution -2x+y=2 and 2x+y=6

Answer 1

2x + y = 6
y = 6 - 2x

-2x + y = 2
-2x + (6 - 2x) = 2

Answer 2

continue the process

Answer 3

how to solve this problem i am new to this lesson?

Answer 4

-2x + (6 - 2x) = 2
-2x + 6 -2x = 2 combine similar terms,
-4x + 6 = 2 transpose 6 to the other side,
-4x = 2 - 6 subtract
-4x = -4 divide both sides by -4
x = 1

Answer 5

then just substitute the value of x to any equation you like.

Answer 6

where did you get the 4?

Answer 7

auh okey,i understand you multiply it
tnx

Answer 8

Your welcome :D

Answer 9

did you get the value of y?

Answer 10

not yet....still getting

Answer 11

Okay. take your time. Tip: substitute it to where Y is the only variable at one side and all the other at the other side. XD

Answer 12

is my answer correct? y=2x-6
y=2(1)-6
y=-2-6
y=-8 ????? is it right or wrong i really wanted to learn.

Answer 13

You're almost right. Just remove the negative sign at 2 . How did you obtain a negative sign at 2?

Answer 14

ohhh!! no!!!!

Answer 15

okey sorry.. so the answer would be


y=2x-6
y=2(1)-6
y=2-6
y=-8 ???

Answer 16

when you subtract 2 by 6 you'll get what? it's -4, right? not -8

Answer 17

yeah.okay sorry about that

Answer 18

tip: just subtract the lower from the higher then base the sign on the higher number.

Answer 19

understood. do you know how to do checking??

Answer 20

yeah.
Using the ORIGINAL equation, just substitute both values.

Answer 21

okey. thank you so much for the tutorial i really enjoy it thanks alot!

Answer 22

No problem. if you need help, don't hesitate to ask. :]]

Answer 23

ok.:)