If you mean: 7x-30 = 180 then the value of x is 30
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If you meant x to be the third interior angle, x would equal 80, because the sum of all three interior angles of a triangle equals 180. So 80+50+50=180
Algebraically, with X = ' what. '30X = 180X = 180/30X = 6=====
180
Supplementary angles add up to 180 degrees. So, if x is the supplementary angle to 148.7 degrees, solve for x: 148.7+x=180 x=180-148.7=31.3 degrees
Need more information... All you say is how do you find the angle of a right triangle... Well 90 + X + Y = 180 90 Being the 90 Degree Angle 180 Being the entire degree measure of a triangle. X+Y is simply used to find the value of on you if you have the other. Lets say 30 is X 90 + 30 + Y = 180 120 + Y = 180 Y = 60