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Setler [38]
3 years ago
8

Solve -2= -(x-8), justifying each step with an algebraic property PLZ HELP

Mathematics
1 answer:
vredina [299]3 years ago
7 0
-2 = -(x-8)
-2 = -x + 8   ( - * + = -  and - * - = + )

-2 - 8 = -x +8 - 8
-2 - 8 = -x 
-(2+8) = - x
-10 = -x     | * (-1)

 x=10

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Simplify (9 + 8 – 6)(4 – 5).
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Which ordered pair represents the solution to the system of equations? {−5x+7y=−196x−2y=10
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Answer:
x = 1
y = -2

Explanation:
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-5x + 7y = -19
-5x + 7y - 7y = -19 - 7y
-5x = -19 - 7y
-5x/ -5 = -19 - 7y/ -5
x = -19 - 7y/ -5

Next, substitute the value of x into the second equation and solve.

6 - (-19 - 7y)/ 5 - 2y = 10
- 6(-19 - 7y)/ 5 - 2y = 10

Then, solve for y

- 6(-19 - 7y)/ 5 - 2y = 10
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x = - 19 - 7y/ 5
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x = 1
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