Question

Solve, using the substitution method.

y – 2x = 8
16 + 4x = 2y

Answer 1

y-2x = 8
add 2x on both sides, what u get ?

Answer 2

y=9+2y

Answer 3

now plug in y= 8+2x in 2nd equation

Answer 4

I thought of doing -2x=8-y

Answer 5

that can work, but things will get complicated soon.

Answer 6

16+4x=2(8+2x)

Answer 7

I see... I will use the way u told me than

Answer 8

yes, simplify 2(8+2x)

Answer 9

16+4x=16+4x

Answer 10

O.O IMPOSSIBLE

Answer 11

correct.
now think logically, when is that true

Answer 12

not impossible
its like 0=0

Answer 13

S0 infinite number of solutions

Answer 14

you take any value of x or y
16+4x will always be = 16+4x

so, yes, infinite solutions :)

Answer 15

yay! Thanks so much

Answer 16

Note how one of the given equations is a multiple of the other given equation. That's all the info you need to decide "infinitely many solutions."

Answer 17

I see, Thanks :)

Answer 18

:)