The number of new cases of a virus this week is 23% more than the number last week. This week, there were 7134 new cases. How ma
ny new cases were there last week?
1 answer:
Answer:
5800
Step-by-step explanation:
Let's say that the amount of cases last week is x.
When it says 23% more than x, it means 123% of x.
With this, we can make an equation.
.
To solve:
1. Multiply both sides by 100
123x = 7134*100
123x = 713400
2. Divide both sides by 123
x= 713200/123
x= 5800
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y = 3x - 1
x - y = -9
Subs y in second equation.
x - (3x - 1) = -9
x - 3x + 1 = -9
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x = -10/-2
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Subs x
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y = 3.5 - 1
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