Question

Find the value for x in the given triangle ABC∠A = ( x -10 ), ∠B = ( 4x-30 ), ∠C= 70

Answer 1

∠A+∠B+∠C=180. {sum of measurement ofangles of triangle is 180}

x -10+4x-30+70=180

5x+30=180

5x=180-30

5x=150

x=150/5

x=30