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What value of a makes both equations true?

What value of a makes both equations true?-example-1
User Tuizi
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Answer Addition: a + b. The operation sign is +, and is called the plus sign. Read a + b as "a plus b."

1) For example, if a represents 3, and b represents 4, then a + b represents 7.

2) Subtraction: a − b. The operation sign is −, and is called the minus sign. Read a − b as "a minus b."

1) If a represents 8, for example, and b represents 2, then a − b represents 6.

3) Multiplication: a · b. Read a · b as "a times b."

The multiplication sign in algebra is a centered dot. We do not use the multiplication cross ×, because we do not want to confuse it with the letter x.

And so if a represents 2, and b represents 5, then

a · b = 2 · 5 = 10.

"2 times 5 equals 10."

Do not confuse the centered dot -- 2·5, which in the United States means multiplication -- with the decimal point: 2.5.

However, we often omit the multiplication dot and simply write ab. Read "a, b." In other words, when there is no operation sign between two letters, or between a letter and a number, it always means multiplication. 2x means 2 times r:

Explanation:

User Lowtex
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