Question

Victor has some model planes. Last weekend, Victor and his grandfather built four more model planes to add to his collection. Now Victor has a total of 42 model planes.

Part A: In the first box, enter an equation to represent the number of planes, x, Victor originally had.

Part B: In the second box, enter the number of planes represented by x in this situation.

Answer 1

x = 42 - 4

x = 38

Explanation:

Given that :

Initial number of plane models = x

Number of additional models built = 4

Total number of planes = 42

Total = initial amount + additional amount

42 = x + 4

Make x the subject

42 - 4 = x + 4 - 4

x = 42 - 4

X + 4 = 42

X = 42 - 4

X = 38