Question

Sam's height is 15 centimeters less than 2 times Martha's height. If Sam is 185 centimeters tall, and Martha's height is x, the relationship between the heights can be represented by the equation 2x − 15 = 185. What is Martha's height?

Answer 1

Move fifteen to the other side as a positive number
2x= 200
Divide both sides by two
So x is 100 cm. therefore Martha's height is 100cm