kerena8291
20.12.2019 •
Mathematics
Find the value of x:
a= 12
b= 16
c= 21
d= 24
Solved
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Ответ:
x = 21
Step-by-step explanation:
The 2 angles form a straight angle and are supplementary, thus
7x + 9 + 2x - 18 = 180, that is
9x - 9 = 180 ( add 9 to both sides )
9x = 189 ( divide both sides by 9 )
x = 21
Ответ:
go more in detail
add picture please
Step-by-step explanation: