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suter [353]
4 years ago
12

HELP!!!!1) Simplify the expression –4(x – 7) + 3(x + 9).

Mathematics
1 answer:
marishachu [46]4 years ago
3 0

Answer:

-x + 55

Step-by-step explanation:

-4 X x = -4x

-4 X -7 = 28

3 X x = 3x

3 X 9 = 27

-4x + 3x = -x

28 + 27 = 55

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Step-by-step explanation:

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3 years ago
The age of a father is 2 less than 7 times the age of his son. In 3 years, the sum of their ages will be 52. If the son’s presen
fomenos
Hello,

Let's assume f the age of the father,
s the age of the son.

<span>The age of a father is 2 less than 7 times the age of his son ==> f=7s-2 (1)

</span>
<span>In 3 years, the sum of their ages will be 52 ==>(f+3)+(s+3)=52 (2)

(2)==>f+s+6=52
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(3) and (1) ==>7s-2+s=46
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</span>

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