Answer:
In the triangle we are given Angle A,B andC
a) To find the value of x we will say
angle A + angle B + angle C = 180(sum of angles in triangle add up to 180)
35 + 52 + 3(x+2) = 180
87 + 3x + 6 = 180
3x + 93 = 180
3x = 180 - 93
3x = 87
x = 29
b) To find the measure for angle C we need to substitute the value of x
angle c = 3(x+2)
= 3(29+2)
= 3(31)
= 93