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borishaifa [10]
3 years ago
13

-5 + 5=. (-10) + 10=

Mathematics
1 answer:
Nikolay [14]3 years ago
6 0

Answer:

0

Step-by-step explanation:

-5 + 5 = 0

-10 + 10 = 0

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A student solved a system of equations by elimination. Describe and correct the error made in the part of the solution shown.
ivanzaharov [21]

Answer:

x = -2; y = 3

Step-by-step explanation:

5x + 4y = 2 (1)

3x + 3y = 3 (2)

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The first error is when he multiplied equation (2) by 4

He didn't multiply the right hand side of the equation by 4

3x + 3y = 3 ×4

12x + 12y = 12

But he wrote

12x + 12y = 3

The the next error is subtracting the left hand side of the equation and adding the right hand side

15x + 12y = 6

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He wrote

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7 0
3 years ago
12 - (-4) = ? AND how do I solve it?
iVinArrow [24]
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