2x+4(2x+7)=3(2x+4) can someone please help me I need to find x

9514 1404 393

  x = -4

Step-by-step explanation:

Start by eliminating parentheses and collecting terms.

  2x +8x +28 = 6x +12 . . . . eliminate parentheses

  10x +28 = 6x +12 . . . . . . . collect terms

  4x +28 = 12 . . . . . . . . . . subtract 6x

  4x = -16 . . . . . . . . . . . .subtract 28

  x = -4 . . . . . . . . . . . divide by 4

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Check

  2(-4) +4(2(-4) +7) = 3(2(-4) +4) . . . . substitute for x

  -8 +4(-8 +7) = 3(-8 +4) . . . . evaluate products in parentheses

  -8 +4(-1) = 3(-4) . . . . . . evaluate sums in parentheses

  -8 -4 = -12 . . . . . . . . . true

he used the algebra tiles correctly.

step-by-step explanation:

given : 3x(2x-1)

solution :

since he used algebra tiles .

armando's solution is the same in the solution shown in figure

as he distributed 2x into x and x and wrote them vertically

and also write   -1 vertically

and 3x into x and x and x and wrote it horizontally

performing the multiplication in the algebra tiles we get

and solving the given expression :

3x(2x-1)

since solving the expression using tiles   and solving the expression algebraically we get the same answer

thus   we can choose the first statement as the answer to this problem which is "he used the algebra tiles correctly".

its d. the first coordintaes are 10,32

step-by-step explanation: