Since the 2 angles are directly across from each other they share the same agle meaning u can make them equal to each other 3x+50=6x-10
So the rule of solving this type of equation is to get the variable on one side of the equation but u have to follow the zero property 3x-3x+50=6x-3x-10
So then u get 50 = 3x-10 so use the same rule to get the 10 to the other side 50+10= 3x-10+10
Then you get 60 = 3x then just use the division property of equality
60/3=3x/3 and x = 20
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