Answer:
53
Step-by-step explanation:
they are a linear pair so x + 2x + 21 = 180 so you subtract 21 from both sides, combine x and 2x then divide by 3 to get 53
Answer:
The answer is: The sum of x and y is a rational number.
Step-by-step explanation:
x is a rational number (any).
is a rational number too.
So, the sum of x and y will also be a rational number.
For the first one it’s subtraction property of equality