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anonymous
 one year ago
Solve the system using substitution and describe your steps
x = y  3
2x + y = 12
anonymous
 one year ago
Solve the system using substitution and describe your steps x = y  3 2x + y = 12

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Vocaloid
 one year ago
Best ResponseYou've already chosen the best response.2the first equation (x = y  3) tells us that we can replace x with y  3 whenever we see it, right? look at the second equation, replace x with (y3) and solve for y then go back and solve for x using the first equation

Vocaloid
 one year ago
Best ResponseYou've already chosen the best response.2dw:1434682745946:dw

Vocaloid
 one year ago
Best ResponseYou've already chosen the best response.2does this make sense? see how we replace "x" with (y3)?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0is that the final answer?

Vocaloid
 one year ago
Best ResponseYou've already chosen the best response.2no, but do you understand so far?

Vocaloid
 one year ago
Best ResponseYou've already chosen the best response.2ok, so we have 2(y3) + y = 12, so what do you get when you distribute the 2?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0where do u distribute it to

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0this is a new concept

Vocaloid
 one year ago
Best ResponseYou've already chosen the best response.2dw:1434682989334:dw

Vocaloid
 one year ago
Best ResponseYou've already chosen the best response.2excellent, so far we have 2y  6 + y = 12, so combine like terms to find y

Vocaloid
 one year ago
Best ResponseYou've already chosen the best response.2getting there, now add 6 to both sides and divide by 3 to find y

Vocaloid
 one year ago
Best ResponseYou've already chosen the best response.2great, so we know that y = 6, but we're still not done yet because we need to find x from the first equation, we know that x = y  3, and since y = 6, what is x?

Vocaloid
 one year ago
Best ResponseYou've already chosen the best response.2good! x = 3 and y = 6 generally, the solution to a system of equations is written as (x,y), so since x = 3 and y = 6, our solution is (3,6) that's our final answer
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