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Butoxors [25]
2 years ago
10

Determine the value of x (ill give brainliest)

Mathematics
2 answers:
r-ruslan [8.4K]2 years ago
7 0

Answer:

12

Step-by-step explanation:

9 * 12 - 2 = 61

7 * 12 + 12 = 61

Zina [86]2 years ago
4 0

Answer:

I believe the answer is 7

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2 years ago
7(2x-5)=21<br><br> What is x?
Over [174]

Answer:

x = 4

General Formulas and Concepts:

<u>Pre-Algebra</u>

Order of Operations: BPEMDAS

  1. Brackets
  2. Parenthesis
  3. Exponents
  4. Multiplication
  5. Division
  6. Addition
  7. Subtraction
  • Left to Right

Equality Properties

Step-by-step explanation:

<u>Step 1: Define Equation</u>

7(2x - 5) = 21

<u>Step 2: Solve for </u><em><u>x</u></em>

  1. Distribute 7:                   2x - 5 = 3
  2. Isolate <em>x</em> term:                2x = 8
  3. Isolate <em>x</em>:                         x = 4

<u>Step 3: Check</u>

<em>Plug in x into the original equation to verify it's a solution.</em>

  1. Substitute in <em>x</em>:                  7(2(4) - 5) = 21
  2. Multiply:                             7(8 - 5) = 21
  3. Subtract:                            7(3) = 21
  4. Multiply:                             21 = 21

Here we see that 21 does indeed equal 21.

∴ x = 4 is the solution to the equation.

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2 years ago
The curved surface area of a solid<br> cylinder is 660 cm2. what is a curved surface area
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Step-by-step explanation:

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