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Fatima has 3 packs of batteries. Each pack contains 4 batteries. She gives her brother 8 batteries to put in his toy robot.

Let b represent the number of batteries Fatima has left.

Which equation could be used to find the value of b?

3×4−8=b

3+4−8=b

3 × 4 + 8 = b

3 + 4 + 8 = b

Respuesta :

Using a system of equations, it is found that the equation that could be used to find the value of b is given by:

3×4−8=b

What is a system of equations?

A system of equations is when two or more variables are related, and equations are built to find the values of each variable.

Fatima has 3 packs of batteries. Each pack contains 4 batteries, hence:

b = 3 x 4

She gives her brother 8 batteries to put in his toy robot, hence:

b = 3 x 4 - 8

Which means that the first expression is correct.

More can be learned about a system of equations at https://brainly.com/question/24342899

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