Question

When x = 5, the value of the expression StartFraction 20 Over negative 25 plus x EndFraction–2(x – 10) is

Answer 1

The value of the expression is 9 .

Expression is the collection of numbers and letters combined with each other with the help of some mathematical operators.

• Also it is a sentence with at least two numbers and at least one mathematical operation. This mathematical operation can be addition, subtraction, multiplication and division.
• The expression structure is: Expression = (number, math operator, number)

The expression is start fraction 20 Over negative 25 plus x end fraction -2(x – 10)

It can be written as $\frac{20}{25+x} -2(x-10)$

As the value of x is 5

putting x = 5 in the expression

=  $\frac{20}{-25+x} -2(x-10)$

= $\frac{20}{-25+(5)} -2((5)-10)$

= $\frac{20}{-20} -2(-5)$

=  $-1 + (10)$

= 9

The value of expression  $\frac{20}{25+x} -2(x-10)$, when x = 5 is 9.

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