Answer:
x = 165
Step-by-step explanation:
One angle fact that we must utilise on this question is the fact that angles on a straight line sum to 180°. This fact is important since we are presented with a straight line and we need work out the value of x. We need to set an equation to find the value of x so,
0.3 x + 64 + 0.1 x + 50 = 180
→ Simplify the equation
0.4x + 114 = 180
→ Minus 114 from both sides to isolate 0.4x
0.4x = 66
→ We can multiply both sides by 10 to make 0.4x to 4x and 66 to 660, I did this because it get's rid of decimal's
4x = 660
→ Divide both sides by 4 to find the value of x
x = 165
