Question

How do you solve this please give steps

Answer 1

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 2

Answer:

x = 53

Step-by-step explanation:

Assuming that the river is of constant width throughout.

x + (2x + 21) = 180

x + 2x + 21 = 180

3x + 21 = 180

3x = 159

x = 53