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Chapter 1: Q13. (page 53)

In the figure at the right, state the value of x.

Short Answer

Expert verified

The value of x is 55掳.

Step by step solution

01

- State the definition of a variable.

A variable is a term that is used to represent an unknown value.

02

- Evaluate the value of x.

Consider the diagram:

In the the diagram two angles are formed on a straight line.

And it is known that sum of angles on a straight line is 180掳.

Then, from the diagram,

2x+70掳=180掳.

Simplify the equation by subtraction and division,

2x+70鈭�鈭�70鈭�=180鈭�鈭�70鈭�2x=110鈭�2x2=110鈭�2x=55鈭�
03

- State the conclusion.

Therefore, the value of x is 55掳

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