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y - 2x = 10 y = 4x + 8 Solve by substitution.

Mathematics
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well, you know that y = 4x + 8, so you just substitute that for y in the first equation
y=2x+10 2x+10=4x+8 solve
2x+2=4x 2x=2 x=1

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Other answers:

do you know what to do now?
Actually can do do it again. I'm still lost.
first you would find y in terms of x
it would be (4x + 8) - 2x = 10
so you combine like terms first
4x and -2x being like terms
How do you get -2x?
because in our equation, it says (4x + 8) - 2x = 10. minus 2x is the same as -2x
so to combine 4x and -2x, it would be 4x - 2x, which is...
Oh man. I wrote that backwards.
Its y = 2x - 10
what? can you write the whole question correct? :/
Its y = 2x - 10 y = -4x + 8
oh
ok, so it would be 2x - 10 = -4x + 8
now you have to add 4x to both sides
wait.
nvm, continue doing that
Alright thanks. I understand now.
oh ok.

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