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Kipish [7]
3 years ago
15

What is the answer to the equation 5+2(x-1)=12

Mathematics
2 answers:
I am Lyosha [343]3 years ago
4 0
5+2(x-1)= 12
So you need to get rid of parentheses, which is that you have to distribute.
5+2x-2= 12
-5             -5    (Inverse)
2x-2= 7
    +2  +2         (Another inverse)
<u>2x</u>= <u>9
</u>2      2       (Divide)

x= 4.5
----------------------
Check
5+2(4.5-1)=12
5+2(3.5)=12
5+7=12
12=12
S_A_V [24]3 years ago
3 0
5+2(x-1)=12 \\ \\ 2 ( x - 1) = 12 - 5 \ / \ subtract \ 5 \ from \ each \ side \\ \\ 2(x - 1) = 7 \ / \ simplify \\ \\ x - 1 =  \frac{7}{2} \ / \ divide \ each \ side \ by \ 2 \\ \\ x =  \frac{7}{2}  + 1 \ / \ add \ 1 \ to \ each \ side \\ \\ x =  \frac{9}{2} \ / \ simplify \\ \\

So, the answer to this problem is x = 9/2 or x = 4.5.
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Answer:

5 cups is 2.5 pts

Step-by-step explanation:

cups pts

5.00 2.5

5.01        2.505

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8 0
3 years ago
I don't know how to find the answer for (3 + 6b + 3b^2). I'm still confused even after my teacher explained it. Could someone br
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Answer:

steps below

Step-by-step explanation:

3 + 6b + 3b² = 3 (b² + 2b + 1) = 3 (b + 1)²

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8 0
3 years ago
A box contains 1079 counters which are coloured either black, white or red.
aleksley [76]

<u><em>The total number of red counters that are in the box is; 728 red counters</em></u>

  • We are told that the box contains 1079 counters.

Let the number of white counters be x.

Let the number of red counters be y.

Let the number of black counters be z.

Thus;

z:x = 2:7

Thus; 2x/7 = z

Also, we are given;

x:y = 3:8

Thus;

8x/3 = y

  • Since total number in the box is 1079,then;

x + y + z = 1079

x + (8x/3) + (2x/7) = 1079

Multiply through by 21 to get;

21x + 56x + 6x = 22659

83x = 22659

x = 22659/83

x = 273

2x/7 = z

Thus; z = 2 × 273/7

z = 78

8x/3 = y

y = 8 × 273/3

y = 728

  • Thus,there are;

273 white counters

728 red counters

78 black counters.

Read more at; brainly.com/question/11712611

4 0
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raketka [301]

Answer:

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Step-by-step explanation:

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4 0
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muminat

Answer:

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Step-by-step explanation:

8 0
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