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Korvikt [17]
3 years ago
14

Jade had the following system of equations to help her with a physics problem, but she only needed to know what the sum of x and

y is.
2x+3y=12
2x-y=4
What is the value of x+y?
Mathematics
1 answer:
pav-90 [236]3 years ago
8 0
From the second:

2x-y=4

x=(4+y)/2 and applying this to first:

4+y+3y=12

4y+4=12

4y=8

y=2 and since x=(4+y)/2, x=3 so 

x+y=2+3=5
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Answer:

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Step-by-step explanation:

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Step-by-step explanation:

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Simplifying

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Remove parenthesis around (3 + 20m)

3 + 20m + -1(7m + -5) = 0

Reorder the terms:

3 + 20m + -1(-5 + 7m) = 0

3 + 20m + (-5 * -1 + 7m * -1) = 0

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Reorder the terms:

3 + 5 + 20m + -7m = 0

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8 + 20m + -7m = 0

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8 + 13m = 0

Solving for variable 'm'.

Move all terms containing m to the left, all other terms to the right.

Add '-8' to each side of the equation.

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Divide each side by '13'.

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Simplifying

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