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Alex17521 [72]
2 years ago
14

What's the property of equality of r- 20 = 30

Mathematics
2 answers:
Harman [31]2 years ago
7 0

Addition Property: For all real numbers x,y, and z , if x=y , then x+z=y+z .

eflexive Property: For all real numbers x , x=x . A number equals itself.

Subtraction Property: For all real numbers x,y, and z , if x=y , then x−z=y−z .

so its subtraction property

galina1969 [7]2 years ago
3 0

Answer:

r= 10

Step-by-step explanation:

30 - 20 = 10

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Answer:

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Step-by-step explanation:

\sqrt{20}

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3 years ago
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nadya68 [22]

Answer:

Solution: x = 135

Step-by-step explanation:

Hi there!

First, let´s write the equation:

√(x + 9) /4 = 3

Multiply by 4 both sides of the equation

√(x + 9) = 12

square both sides of the equation

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subtract 9 to both sides of the equation

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Let´s check the solution:

√(x + 9) /4 = 3

x = 135

√(135 + 9) /4 = 3

√(144) /4 = 3

12/4 = 3

3 = 3

Then, x = 135 is the solution to the equation.

Have a nice day!

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Step-by-step explanation:

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