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Ket [755]
3 years ago
12

(7w+4h)+ 5(2w+3h)- 2(w+h)

Mathematics
2 answers:
Andre45 [30]3 years ago
4 0
(7w+4h)+5(2w+3h)-2(w+h)
(7w+4h)+10w+15h-2w-2h
7w+10w-2w+4h+15h-2h
15w+19h
jasenka [17]3 years ago
3 0
7w + 4h + 10w + 15h - 2w - 2h
= 15w + 17h
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ch4aika [34]

Answer:

<h2>A)x=3/2 y=½</h2>

Step-by-step explanation:

<h3>to understand this</h3><h3>you need to know about:</h3>
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  • PEMDAS
<h3>let's solve:</h3>
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  1. \sf substitute \: the \: value \: of \: y :  \\  \sf  - x + 2 = 3x - 4
  2. \sf add \: x \: to \: both \: sides :  \\  \sf  - x + x + 2 = 3x + x - 4 \\  \sf 4x - 4 = 2
  3. \sf add \: 4 \: to \: both \: sides :  \\  \sf xx - 4 + 4 = 2 + 4 \\ 4x = 6
  4. \sf divide \: both \: sides \: by \: 4 :  \\  \frac{4x}{4}  =  \frac{6}{4}  \\ x =  \frac{3}{2}

let's figure out y

  1. substitute the got value of x into the second equation: y=3*3/2 -4
  2. simplify multiplication:9/2 -4
  3. simplify division:4.5-4
  4. substract:0.5 alternate form:y=½

3 0
3 years ago
PLEASE ANSWER!! WILL MARK BRAINLIEST
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The Answer I think is 21
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Step-by-step explanation:

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Answer:

b)

a)

a)

Step-by-step explanation:

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