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automaticloveletter
 one year ago
Which of the following ordered pairs represents the solution to the system given below?
2x + y = 20
4x − 2y = 40
(10, 0)
(0, 10)
(4, 2)
(10, −10)
automaticloveletter
 one year ago
Which of the following ordered pairs represents the solution to the system given below? 2x + y = 20 4x − 2y = 40 (10, 0) (0, 10) (4, 2) (10, −10)

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iGreen
 one year ago
Best ResponseYou've already chosen the best response.1You can use substitution to solve.

iGreen
 one year ago
Best ResponseYou've already chosen the best response.1\(\sf 4x  2y = 40\) Subtract 4x to both sides: \(\sf 2y = 4x + 40\) Divide 2 to both sides: \(\sf y = 2x  20\) Now plug in \(\sf 2x  20\) into the first equation for \(\sf y\) and solve for \(\sf x\), then plug that into any of the two equations to find \(\sf y\).

automaticloveletter
 one year ago
Best ResponseYou've already chosen the best response.1I'd rather have you walk me through it can you?

iGreen
 one year ago
Best ResponseYou've already chosen the best response.1Okay, we have: \(\sf 2x + (2x  20) = 20\) Can you solve that for \(\sf x\)?

automaticloveletter
 one year ago
Best ResponseYou've already chosen the best response.1So it's 10, ?

Vocaloid
 one year ago
Best ResponseYou've already chosen the best response.2continuing from here, we know that x = 10 since you just solved for it let's take one of our original equations 2x + y = 20 let x = 10 and solve for y
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