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const2013 [10]
3 years ago
8

2/3•x-9=12 solve for x?

Mathematics
2 answers:
Margaret [11]3 years ago
7 0

Answer:

x=\frac{63}{2}

Step-by-step explanation:

\frac{2}{3} \times x-9=12

Add 9 to both sides:

\frac{2}{3}x-9+9=12+9\\\frac{2}{3}x=21

Multiply both sides by 3/2:

(\frac{3}{2} )\times(\frac{2}{3}x)=(\frac{3}{2}  )*(21)\\x=\frac{63}{2}

x = 63/2 is your answer.

Fofino [41]3 years ago
3 0

Answer:

31.5

Step-by-step explanation:

Ok.

2/3x - 9 = 12

2/3x = 21

x = 21*(3/2)

x = 63/2 = 31.5

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Answer:

X=40°

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Step-by-step explanation:

Let our unknown angles be denoted by X

Part I

We are given the sum of the angles as 70°, the known as 30° and the unknown as X;

To find X, we subtract the known angle from the sum as:

X=70°-30°=40°

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Part II

We are given the sum of the angles as 70°, the known as 40° and the unknown as X;

To find X, we subtract the known angle from the sum as:

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Part III

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To find X, we subtract the known angle from the sum as:

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3 years ago
Tony scored n points in the first basketball game of the season. The expression below represents the total number of points that
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4 years ago
Please help!!
satela [25.4K]

Answer :

Sum = 2x-7 + (-2x) and equivalent expression = -7

Step-by-step explanation:

First number is (2x-7) and other number is opposite of 2x i.e. (-2x).

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Opposite of 2x is (-2x)

Sum means to add the number :

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Removing parentheses,

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3 years ago
2.
Pavel [41]

Answer:

The answer is 45 minutes.

Step-by-step explanation:

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3 years ago
Read 2 more answers
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