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insens350 [35]
4 years ago
11

Adriana's computer code 20% less than jocelyn's computer. Adriana's computer cost $640. Adriana's computer cost 15% more than co

rbins computer. Write an equation that could be used to find the cost of jocelyn's computer
Mathematics
1 answer:
Aliun [14]4 years ago
3 0

Answer:

  640 = 0.80·j

Step-by-step explanation:

Let j represent the cost of Jocelyn's computer (in dollars). Adriana's computer cost 20% less, so has a cost that is 0.80·j. We are told that amount is $640, so we can write the equation ...

  640 = 0.80·j

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Ah, great question. Let me help you on this one.

We need to balance both equations for this to work out. This is needed because question asks us for an x variable that will make both equations equal to each other.

Let's write it out so it's easier for us to understand.

Let's not forget to multiply both sides by 100.

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