Sum of a number, x and 4 all divided by 3
sum of x and 4 means x+4
all divided by 3

evaluate for x=5



it's 3
10.5 grams equals to 0.0105 kilograms
The figure is a right angle
Complementary = sum of 90 degrees
35 + 2x - 5 = 90
30 + 2x = 90
2x = 60
Solution: x = 30