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This is a substitution problem


Mike has 12 computers in his classroom, some are PCs and some are Macs. There are two
Macs for every PC in his classroom. How many Pcs and Macs are there in Mike's classroom

Respuesta :

Answer:4 PCs and 8 Macs

Step-by-step explanation:

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They consists of equations and unknown variables. There are 4 PCs and 8 Mac in the room

System of equation

They consists of equations and unknown variables

Let the number of PCs be x

Let the number of Mac be y

If Mke has 12 computers, then;

x + y = 12

If there are two Macs for every PC in his classroom, then;

y = 2x

Substitute

x + 2x = 12

3x = 12

x = 4

Recall y = 2x

y = 2(4)

y = 8

There are 4 PCs and 8 Mac in the room

Learn more on system of equations here; https://brainly.com/question/14323743

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