One of the angles in an equilateral triangle is (420/9-x) degrees. Solve to find the value of x?
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9-x) degrees. Solve to find the value of x?
One of the angles in an equilateral triangle is (420/9-x) degrees. Solve to find the value of x?
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Answer:
Step-by-step explanation:
As mentioned its an equilateral triangle which means all angles are equal
And sum of all angles of triangle is 180
So, each angle is 180/3=60
Now lets find x
Its given that one of angle is 420/9-x
So, 420/9-x=60 (explained above)
420=60(9-x) (cross multiply)
420=540-60x (bracket open)
Now like terms at one side
420-540= -60x
-120= -60x
-120/-60=x (cross multiply and variable a side)
2=x
If someone confused in minus signs then for them
420=540-60x
60x=540-420 (Arranging both sides and like terms in same side)
60x=120
x=120/60 (cross multiply)
x=2