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mezya [45]
3 years ago
9

What is the solution to this system of linear equations?

Mathematics
1 answer:
const2013 [10]3 years ago
6 0
Solve by elimination

y-x=6
y+x=-10
2y=-4
÷2 both sides
y=-2
solve for X

-2+x=-10
+2 both sides
x=-8

(-8,-2)
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1. (2x+5)+(3x-2)= <br> 2. (3x-2)-(2x+5)=<br> 3. (2x+5)-(3x-2=
DIA [1.3K]

Answer:

  1. 5x+3
  2. x -7
  3. -x +7

Step-by-step explanation:

Combine like terms. The associative and commutative properties of addition apply, as does the distributive property.

__

1. (2x+5)+(3x-2) = (2x +3x) +(5 -2) = 5x +3

__

2. (3x-2)-(2x+5) = 3x -2 -2x -5 = (3x -2x) +(-2 -5) = x -7

__

3. (2x+5)-(3x-2) = 2x +5 -3x +2 = (2x -3x) +(5 +2) = -x +7

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<em>Additional comment</em>

Note that swapping the order of operands in a subtraction problem (problems 2 and 3) will cause the sign of the result to reverse.

6 0
3 years ago
Rewrite the equation without absolute value, thanks!
34kurt

Since x - 3 < 0 for -2 < x < 3, |x-3| = -(x-3)

Since x + 2 > 0 for -2 < x < 3, |x+2| = x+2

Since x - 5 < 0 for -2 < x < 3, |x-5| = -(x-5).

So y = -(x-3) + (x+2) -(-(x-5)) = 3 - x + x + 2 + x - 5 = x.

y = x, if -2 < x < 3.

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Answer:

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16/25 = 0.64 = 64%

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