If 3 angles of a triangle are (2x+15),85,(x+20) find the value of x - Maths - Simple Equations

Question

If 3 angles of a triangle are (2x+15),85,(x+20) find the value
of x

Akhilesh Dixit · Accepted Answer

sum of angles of a triangle = 180' [angle sum property of
triangle]
sum of three angles = (2x+15) + 85 + (x + 20) = 3x + 120
now, 3x + 120 = 180
3x = 180 - 120
3x = 60
x = 60/3 = 20
so, first angle = 2x + 15 = 2(20) + 15 = 40 + 15 = 55
third angle = x + 20 = 20 + 20 = 40

If 3 angles of a triangle are (2x+15),85,(x+20) find the value of x.