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Citrus2011 [14]
3 years ago
8

Hoang has worked as a nurse at Springfield General Hospital for 7 years longer than her friend Bill. Two years ago, she had been

Mathematics
1 answer:
Evgesh-ka [11]3 years ago
3 0

Answer:

Bill\to 9\ years

H \to 16\ years

Step-by-step explanation:

Let

H \to Hoang

B \to Bill

Currently:

H = B + 7

Two years ago

H - 2 = 2 * (B -2)

Required

H and B

We have:

H - 2 = 2 * (B -2)

Open bracket

H -2 =2B - 4

Add 2 to both sides

H -2+2 =2B - 4+2

H =2B -2

Substitute H = B + 7

B + 7 =2B -2

Collect like terms

2B - B =7+2

B = 9

Substitute B = 9 in H = B + 7

H = B + 7

H = 9 + 7

H = 16

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