Question

A torch and a battery together cost $15. The torch costs $10 dollar more than the battery. How much does the battery cost?

Answer 1

Battery cost = 5

Explanation:

Set it up algebraically:

x + 10 = 15

*One step equation: an algebraic equation you can solve in only one step. Once you've solved it, you've found the value of the variable that makes the equation true. To solve one-step equations, we do the inverse (opposite) of whatever operation is being performed on the variable, so we get the variable by itself. (I knew what it meant, I just needed a website to help me explain it lol)

x + 10 = 15

- 10 - 10

x = 5