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liq [111]
3 years ago
10

5 (x – 4) = 7 (2x + 1)

Mathematics
2 answers:
kumpel [21]3 years ago
8 0

Answer:

-3

Step-by-step explanation:

5 (x - 4) = 7 (2x + 1)

5x - 20 = 14x + 7

5x = 14x + 27

-9x = 27

x = -3

5 (-3 - 4) = 7(2(-3) + 1)

5 (-7) = 7 (-5)

-35 = -35

So, the value of x is equal to -3.

Andrew [12]3 years ago
3 0

Answer:

-3

Step-by-step explanation:

5x - 20 = 14x + 7

5x - 14x = 7+ 20

- 9x = 27

x = -3

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5 0
3 years ago
Micheal took his brother to the movies. Micheal paid regular price, but it cost $2 less for his brother at the child price. It c
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It cost $5 for his brother's ticket.

Step-by-step explanation:

Let,

Micheal's ticket price= x

His brother ticket price = y

According to given statement;

x+y=12    Eqn 1

y = x-2    Eqn 2

Putting value of y from Eqn 2 in Eqn 1

x+(x-2)=12\\x+x-2=12\\2x=12+2\\2x=14\\

Dividing both sides by 2;

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Putting x=7 in Eqn 2

y=7-2\\y=5

It cost $5 for his brother's ticket.

Keywords: linear equation, substitution method

Learn more about linear equations at:

  • brainly.com/question/2747595
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#LearnwithBrainly

8 0
4 years ago
James earned $39,600 last year. He paid $11,250 towards rent and $1,422 in car payments. What percent of his earnings did Jon pa
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Step 1:
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=11,250+1422
=$12,672

Step 2:
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12,672 is to his total of 39,600 as x is to 100

12,672/39,600 = x/100
cross multiply
(12,672)(100) = (39,600)(x)
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divide both sides by 39,600
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OR

Alternative Step 2:
12,672 ÷ 39,600= 0.32
Alternative Step 3:
0.32 x 100 = 32%
or move decimal to the right 2 places

His rent and car payments are 32% of his earnings.

Hope this helps! :)
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