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nikdorinn [45]
4 years ago
10

I need help and I don't know what to do

Mathematics
2 answers:
Gala2k [10]4 years ago
6 0
Any two opposite angles are equal so, 
12x - y = 10x +5y 
12x-10x = 5y+y 
2x = 6y 
so x=3y ----> eqn.1 

and, the sum of all angles are equal 360 degrees 
so 12x-y + 2x+4y + 10x+ 5 y + 3x + y = 360 then , 27x + 9y = 360  substitute by y= x/3 from eqn.1 the 27x +9(x/3) = 360 27x+3x=36030x=360x=12 substitute in eqn.1 y=x/3 y=12/3y=4 so  we get x = 12 & y = 4

andreev551 [17]4 years ago
5 0
I think combine like terms  
12x+10x+3x+2x      -y+y+5y
X=27                       Y=5y

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