Question

variable in the expression 2a+5 is​

Answer 1

Answer:

2a

Step-by-step explanation:

As a can be any number.

2a + 5 could be 7 if a is 1

2a + 5 could be 9 if a is 2

Etc.

Thus 2a is the variable as it has no fixed value as opposed to any constant i.,e  2 or 3 or 4 or 5 or any numerical value.

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Answer 2

Answer:

The value of variable (a) is -2.5

Step-by-step explanation:

Given -

$2a+5$

To find -

The value of variable (a)

Solution -

given equation

$2a+5$

As, there are nothing at right side we consider zero.

$2a+5=0$

Shift 5 to right it becomes (-5)

$2a=-5$

Divide by both side by 2 we get

$a=-2.5$

∴ The value of variable (a) is -2.5