Answer:
x=11
Step-by-step 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
