The cost of a toy is $20 less than 2 times the cost of a toy train. if the cost of the toy car is $100, what is the cost of the toy train?

The toy is 2(x)-20, x is 100, being the toy car. So 2(100)= 200 -20 =180. The cost of the toy is $180

Define x :

Let the cost of the toy train be x.
Toy Train = x
Toy car = 2x - 20


Construct equation :

The toy car costs $100.
⇒ 2x - 20 = 100


Solve x :

2x - 20 = 100
2x = 100 + 20
2x = 120
x = 60 


Find the cost of the toy train :

Cost of the toy train = x = $60


The toy train costs $60.