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fgiga [73]
4 years ago
9

18. [Algebra - Expansion] Expand 3(x + 2)

Mathematics
2 answers:
stepan [7]4 years ago
7 0
First you you distribute the 3 (3 times x and 3 times 2)
3x+6
Then divide 3x on both sides (3x divided by 3x and 6)
Your answer should be x=2
alexira [117]4 years ago
4 0

Answer:

Step-by-step explanation:

3(x + 2) = 3*x + 3*2

= 3x + 6

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Use the matrix method to solve the system of equations 2 x + 4 y = 8 and 6 x + 3 y = -3. The resulting matrix is:
attashe74 [19]

Answer:

x=-2,y=3

Step-by-step explanation:

The given system of equations is

2x+4y=8

and

6x+3y=-3

The augmented matrix is

\left[\begin{array}{ccc}2&4&|8\\6&3&|-3\end{array}\right]

\frac{1}{2}R_1\to R_1

\left[\begin{array}{ccc}1&2&|4\\6&3&|-3\end{array}\right]

-6R_1+R_2\to R_2

\left[\begin{array}{ccc}1&2&|4\\0&-9&|-27\end{array}\right]

-\frac{1}{9}R_2\to R_2

\left[\begin{array}{ccc}1&2&|4\\0&1&|3\end{array}\right]

-2R_2+R_1\to R_1

\left[\begin{array}{ccc}1&0&|-2\\0&1&|3\end{array}\right]

Hence x=-2,y=3

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Step-by-step explanation:

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