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daser333 [38]
3 years ago
9

Solve for x.

Mathematics
1 answer:
gavmur [86]3 years ago
8 0

7 \times 9 + x = 84 \\ 63 + x = 84 \\ x = 21

Answer is C.

Hope this helps. - M
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Analyze the graph of the function f(x) to complete the statement. <br>​
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Step-by-step explanation:

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8 0
3 years ago
John’s father is 5 times older than John and John is twice as old as his sister Alice. In two years time, the sum of their ages
oksano4ka [1.4K]

Answer:

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Step-by-step explanation:

Let

x -----> John’s father's age

y -----> John’s age

z -----> John’s sister's age

we know that

x=5y -----> equation A

y=2z

z=y/2 -----> equation B

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<em>Find the value of x</em>

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<em>Find the value of z</em>

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therefore

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John’s age is 8 years

John’s sister's age is 4 years

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I think b is the correct answer

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