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Deffense [45]
3 years ago
13

How do you solve this please give steps

Mathematics
2 answers:
balu736 [363]3 years ago
7 0

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

SashulF [63]3 years ago
7 0

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

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