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Sidana [21]
3 years ago
8

How do you write and solve equation with an unknown number?

Mathematics
1 answer:
Ivanshal [37]3 years ago
8 0
You have to isolate the variable using inverse operations in order to get it alone. Example: x+3=5
Subtract 3 on both sides since you are adding 3, and subtraction is the opposite of addition.
x=2 is your answer. If you check and plug it in, you will see that it is a correct equation.
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sertanlavr [38]

Answer:

4 for each cupcake.

Step-by-step explanation:

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The tartness of a lemon (which depends on the concentration of citric acid)
nadezda [96]
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4 years ago
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MatroZZZ [7]

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5 0
3 years ago
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Strike441 [17]

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8 0
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Read 2 more answers
Solve the 2x^2 - 5 = 13
DochEvi [55]

Answer:

x=3

x=−3

Step-by-step explanation:

2x^2 - 5 = 13

Subtract 13 from both sides.

2x^2 - 5 - 13 = 0

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2x^2 - 18 = 0

Divide both sides by 2.

x^2 - 9 = 0

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To find equation solutions, solve x−3=0 and x+3=0.

x=3

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4 0
3 years ago
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