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What is 21 plus -9 equals?

Updated: 10/17/2024

Wiki User

∙ 14y ago

Best Answer

12

Justus Rau ∙

Lvl 10

∙ 3y ago

This answer is:

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Wiki User

∙ 14y ago

The answer is 12. Simply add the numbers together arithmetically as you would for the problem two plus two. To check your work, a calculator is the best option.

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Related questions

What is 12 plus 9 equals?

12 plus 9 equals 21.

Solve a plus 9 equals 21?

A + 9 = 21 A = 21 - 9 A = 12

What is 9 plus 5 plus 7 equals?

21

5 plus 7 plus 9 equals?

21

What Is 9 plus x equals 21 for x equals 11?

x â&permil;  11 9 + x = 21 9 + x - 9 = 21 - 9 x = 12

What is the answer for x plus 9 plus 5x equals 21 plus 2x?

If: x+9+5x = 21+2x Then: x = 3

Can you mathematically prove 9 plus 10 equals 21?

No you can not prove that 9 +10 = 21.

What is the answer to the equation 2x plus 3 equals 9 x equals?

21

9 plus ten equals 21?

No, because 9+10 = 19

How do you work out b plus 9 equals 21?

b + 9 = 21 Take the + 9 across the other side of the equals sign. a plus becomes a minus. b = 21 - 9 so... b = 12. This can be checked by setting b to 12 in the first equation b + 9 = 21 12 + 9 = 21 which is correct.

Why do people say 9 plus 10 equals 21?

9+10 =21 is sated from a popular vine

What is the answer for -x plus 12 equals -9?

3

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