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Question

In the algebraic expression, x+99=100, the value of unknown is

A
0
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B
1
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C
2
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D
3
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Solution

The correct option is B 1
The unknown is x
We need to solve x by isolating it to one side of the equation

x+99=100

Subtract both sides of the equation with 99 to eliminate the constant on the left side of the equation.
x+9999=10099x=1

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