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natta225 [31]
3 years ago
12

Nadya solves the equation 4x-4=20. Her work is shown below.

Mathematics
2 answers:
Rama09 [41]3 years ago
6 0
4x-4=20
   +4 +4
4x=24
divide both sides by 4 
x=6
Stells [14]3 years ago
3 0
Step 2 she should add 4 not subtract
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Use addition to solve the linear system of equations. Include all of your work in your final answer. \(\left\{ \right.\) 3x-y=6
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Answer:

Solving the given linear system, we get x = 1 and y = -3.

The solution set is: (1,-3)

Step-by-step explanation:

We need to solve the linear system of equations.

3x-y=6 \\y=x-4

We can write second equation y=x-4  as: -x+y=-4

Let:

3x-y=6--eq(1)\\ -x+y=-4--eq(2)

Now, Adding equation 1 and 2

3x-y=6\\ -x+y=-4\\--------\\2x+0y=2\\2x=2\\x=\frac{2}{2}\\x=1

So, we get x = 1

Now, put value of x in second equation to find value of y:

y=x-4\\Put\:x=1\\y=1-4\\y=-3

So, we get y = -3

Solving the given linear system, we get x = 1 and y = -3.

The solution set is: (1,-3)

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Step-by-step explanation:

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