Question

The value of the expression 2(4k-5) + 3 when k=3 is​

Answer 1

The value of expression 2(4k-5)+3 at k=3 is 17.

Given:

• An expression.
• $2(4k - 5) + 3$

To find:

• The value of expression when k=3.

Solution:

Concept to be used:

• Put the value of k.
• Solve the expression using BODMAS.

Step 1:

Put the value of k in the given expression.

As the expression is

$2(4k - 5) + 3$

put k= 3

$2[(4 \times 3) - 5] + 3$

Step 2:

Apply BODMAS and simplify.

First solve bracket.

$= 2(12 - 5) + 3$

or

$= 2(7) + 3$

or

$= 14 + 3$

or

$\bf = 17$

Thus,

The value of expression at k=3 is 17.

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Answer 2

Given,

An algebraic expression: 2(4k-5) + 3

To find,

The value of the expression when k=3.

Solution,

We can simply solve this mathematical problem using the following process:

Mathematically,

For an algebraic expression in variable x, its value at x=n can be calculated by substituting the x with n in the expression and solving it.

{Statement-1}

Now, according to the question and statement-1;

The value of the expression 2(4k-5) + 3 at k=3

= 2(4k-5) + 3, where the value of k is 3

= 2(4×3-5) + 3

= 2(12-5) + 3

= 2×7 + 3

= 14+3 = 17

Hence, the value of the expression 2(4k-5) + 3 at k=3 is equal to 17.