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ser-zykov [4K]
3 years ago
5

How do you solve this question? -3x - 7 + 5x = 15

Mathematics
1 answer:
KatRina [158]3 years ago
5 0

Answer:

x=11

Step-by-step explanation:

Add 7 to both sides

-3x+5x=22

combine like terms(-3x and 5x)

2x=22

divide by 2

x=11

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6 0
3 years ago
What is the value of x?
Molodets [167]

Answer:

x = 4√5

General Formulas and Concepts:

<u>Pre-Algebra</u>

  • Order of Operations: BPEMDAS

<u>Trigonometry</u>

  • Pythagorean Theorem: a² + b² = c²

Step-by-step explanation:

<u>Step 1: Define</u>

We are given a right triangle. We can use Pythagorean Theorem.

a = 19

b = x

c = 21

<u>Step 2: Find </u><em><u>x</u></em>

  1. Substitute:                    19² + x² = 21²
  2. Isolate <em>x</em> term:               x² = 21² - 19²
  3. Evaluate:                       x² = 441 - 361
  4. Subtract:                       x² = 80
  5. Isolate <em>x</em>:                       x = √80
  6. Simplify:                        x = 4√5

And we have our final answer!

8 0
3 years ago
What is the equation of a line, in general form, with a slope of -2 and a y-intercept of 8?
Finger [1]
Y=mx+b
y= -2x+8
Rearranging gives you the answer of
2x +y - 8 = 0

7 0
3 years ago
Read 2 more answers
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