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yarga [219]
2 years ago
7

Help due soon will give brainliest

Mathematics
1 answer:
Elza [17]2 years ago
5 0

Here is the answer! Hope it helps! (C.)

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Three years hence a father will four times as old as his son will be. Before two years he was seven times as old as his son was.
myrzilka [38]

Answer: The father is 37 years and the son is 7 years

Step-by-step explanation:

Let x represent the present age of the father.

Let y represent the present age of the son.

Three years hence a father will four times as old as his son will be. This means that

x + 3 = 4(y + 3)

x + 3 = 4y + 12

x - 4y = 12 - 3

x - 4y = 9- - - - - - - - - - - - - - - -1

Before two years he was seven times as old as his son was. This means that

(x - 2) = 7(y - 2)

x - 2 = 7y - 14

x - 7y = - 14 + 2

x - 7y = - 12- - - - - - - - - - - - - - -2

Subtracting equation 2 from equation 1, it becomes

3y = 21

y = 21.3 = 7

Substituting y = 7 into equation 1, it becomes

x - 4 × 7 = 9

x - 28 = 9

x = 9 + 28

x = 37

7 0
2 years ago
Read 2 more answers
Y=4x+5 has a gradient of 4. What is the equation of a line parallel to it?
Setler79 [48]
It is -3,-2 is<span> Y=4x+5</span>
8 0
3 years ago
What’s the least common multiple of 12 and 2
NNADVOKAT [17]

For example, for LCM (12,30) we find:

Using the set of prime numbers from each set with the highest exponent value we take 22 * 31 * 51 = 60. Therefore LCM (12,30) = 60.

7 0
2 years ago
3x - 6 = 2 - 5x how do i get x
Elanso [62]

Answer:

x=0.875

Step-by-step explanation:

3x-6=2-5x

Add 6 on both sides (6+2)

2x=8-5x

Add 5x on both sides

7x=8

Divide 7 from both sides

x=0.875

4 0
3 years ago
Translate the word phrase into a math expression. PLEASE HELP!
prohojiy [21]
What are the answer choices
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6 0
3 years ago
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