3 (-4x - 8) + 4 = 28. Solve for x

Mathematics

1 answer:

Len [333]3 years ago

8 0

Answer:

-4

Step-by-step explanation:

i dont know this part but im pretty sure u only need the answer so there u go

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The length of a rectangle is 4 more than the width. The entire perimeter is 38".

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L = 4 + w
perimeter = 38

38 = w + 4 + w
2w = 34
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i am a mathematics teacher. if anything to ask please pm me

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Anuta_ua [19.1K]

Answer:

Answer is given below with explanations.,

Step-by-step explanation:

$1)formula \: for \: linear \: equation \: is \: \\ ax + by + c = 0 \\ 2) \: solution \: of \: the \: equation \: y = 9x - 3 \\ (2,15) \: is \: the \: solution \: \\ on \: substitutuing \: the \: points \\ 15 = 9(2) - 3 \\ 15 = 18 - 3 \\ 15 = 15 \\ hence \: proved\\ 3) \: given \:( k,7) \: is \: a \: solution\\ \: of \: y = - 4x + 1 \\ on \: substitutuing \: the \: points \\ 7 = - 4k + 1 \\ 4k = - 7 + 1 \\ 4k = - 6 \\ k = \frac{ - 6}{4} \\ k = \frac{ - 2}{3}$

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