Question

What is the value of x in the figure on the right

Answer 1

11°

Explanation:

or, 15°+(15x)°=180° (being linear pair)

or, (15x)°=180°-15°

or, (15x)°=165°

or, x°=165°÷15°

Therefore, x°=11°

Answer 2

x=11

Explanation:

The 2 angles are on a straight line, and are said to be supplementary. This means that when added together, the sum must be 180 degrees.

15x+15=180

Now,we need to solve for x, by isolating x. Perform the opposite of what is being done to the equation.

15x+15=180

15 is being added to 15x. Subtract 15 from both sides, because subtraction is the opposite of addition.

15x+15-15=180-15

15x=180-15

15x=165

x is being multiplied by 15. Divide both sides by 15, since division is the opposite of multiplication.

15x/15=165/15

x=165/15

x=11

The value of x is 11