MathematicsHow many variables are there in the following equation?9m-4n-27=7a

How many variables are there in the following equation? $9 m - 4 n - \frac{2}{7} = 7 a$

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A
$0$
B
$2$
C
$4$
D
$3$

Solution:

Given equation,

9 m - 4 n - \frac{2}{7} = 7 a

.
We know that the unknowns in an equation are called variables.
In the given equation, the

m, n

and

a

are the variables.
Therefore, there are

3

variables in the given equation.
Hence, the correct option is 4.

How many variables are there in the following equation? $9 m - 4 n - \frac{2}{7} = 7 a$

Solution:

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