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youngnephew34
 one year ago
What is the value of y in rhombus LMNO
A)4
B)6
C)12
D)24
youngnephew34
 one year ago
What is the value of y in rhombus LMNO A)4 B)6 C)12 D)24

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phi
 one year ago
Best ResponseYou've already chosen the best response.3try to write an equation that shows the two halves of a diagonal are equal

youngnephew34
 one year ago
Best ResponseYou've already chosen the best response.1dw:1440159145510:dw

phi
 one year ago
Best ResponseYou've already chosen the best response.3yes, now write the other equation (for the other diagonal)

phi
 one year ago
Best ResponseYou've already chosen the best response.3we have two equations and two unknowns (x and y are the unknowns) do you know how to solve them? Y+12=6x y= 3x

phi
 one year ago
Best ResponseYou've already chosen the best response.3one way is to use "substitution", the other way is "elimination"

youngnephew34
 one year ago
Best ResponseYou've already chosen the best response.1For the Y+12=6x don't you suppose to subtract one side from another

phi
 one year ago
Best ResponseYou've already chosen the best response.3in this problem, substitution works pretty well. start with the equations: y+12=6x y= 3x notice the 2nd equation says "y is the *same thing* as 3x" we use that to replace the y in the first equation with 3x (erase the y and put in 3x instead) can you do that?

youngnephew34
 one year ago
Best ResponseYou've already chosen the best response.1you will substitute the 3x in to y right

phi
 one year ago
Best ResponseYou've already chosen the best response.3what equation do you get ?

phi
 one year ago
Best ResponseYou've already chosen the best response.3erase the y and put in 3x instead

phi
 one year ago
Best ResponseYou've already chosen the best response.3yes. now we have just 1 unknown... that is good. to solve I would start by adding 3x to both sides, like this 3x  3x + 12 = 6x  3x now simplify

phi
 one year ago
Best ResponseYou've already chosen the best response.3on the right side you have 6 x's take away 3 x's. how many x's do we have?

phi
 one year ago
Best ResponseYou've already chosen the best response.3ok, but write out the whole equation (so we don't get confused) 3x  3x + 12 = 3x on the right side, we have 3x's take away 3 x's

phi
 one year ago
Best ResponseYou've already chosen the best response.3yes last step. divide both sides by 3

phi
 one year ago
Best ResponseYou've already chosen the best response.3the question asks for "y" not x but from the equations we know y= 3x can you find y (knowing x is 4) ?

youngnephew34
 one year ago
Best ResponseYou've already chosen the best response.1Y=4 srry bout that

phi
 one year ago
Best ResponseYou've already chosen the best response.3no, you were correct the first time x=4 but we can find y using y= 3*x

phi
 one year ago
Best ResponseYou've already chosen the best response.3y= 3x says y is the same thing as 3 times x if we knew what x is (as a number) we would multiply it by 3 and we would get y (as a number) but from the earlier steps you found x is 4 that means we can find y using that equation. can you try?

phi
 one year ago
Best ResponseYou've already chosen the best response.3in other words, in y= 3*x erase the x and put in 4 instead (because x is the same thing as 4)

youngnephew34
 one year ago
Best ResponseYou've already chosen the best response.1Instead you would do 4x3 right

phi
 one year ago
Best ResponseYou've already chosen the best response.3yes, but write it 4*3 (because using x for multiply is confusing... it might mean "x" the variable)

phi
 one year ago
Best ResponseYou've already chosen the best response.3right, y=3x y=3*4 y=12 this problem took lots of steps. See if you can go over the steps, and try to understand the way we found y is 12.

youngnephew34
 one year ago
Best ResponseYou've already chosen the best response.1so 3x+12+6x 3x6x=3x 12/3=3/3 12/3=4 x=4 4x3=12

phi
 one year ago
Best ResponseYou've already chosen the best response.33x+12=6x then add 3x to both sides 3x3x + 12 = 6x3x simplify to get 0+12 = 3x or 12=3x < notice we have 3x, not just 3) 4=x

phi
 one year ago
Best ResponseYou've already chosen the best response.3then use y=3x when x is 4 then y = 3*4 =12

youngnephew34
 one year ago
Best ResponseYou've already chosen the best response.1ok got it and one more to check
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