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3 years ago

How to solve 2x plus y equals 4

Mathematics

2 answers:

Natasha_Volkova [10]3 years ago

7 0

2x + y = 4, so 2x = 4 - y, so x = 2 - y/2. or if solving for y, y = 4-2x.

natali 33 [55]3 years ago

5 0

Answer:

y=-2x+4

Step-by-step explanation:

2x+y=4

Step 1: Add -2x to both sides.

2x+y+−2x=4+−2x

y=−2x+4

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Answer:

We conclude that:

$3\cdot \:2\begin{pmatrix}-2&3&0\\ -4&2&6\\ 6&-5&6\end{pmatrix}=\begin{pmatrix}-12&18&0\\ -24&12&36\\ 36&-30&36\end{pmatrix}$

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Step-by-step explanation:

Given the expression

$3\times 2\begin{pmatrix}-2&3&0\\ \:-4&2&6\\ \:6&-5&6\end{pmatrix}$

solving

$3\times 2\begin{pmatrix}-2&3&0\\ \:-4&2&6\\ \:6&-5&6\end{pmatrix}$

Scalar Multiplication: Multiply each of the matrix elements by a scalar

$=\begin{pmatrix}3\cdot \:2\left(-2\right)&3\cdot \:2\cdot \:3&3\cdot \:2\cdot \:0\\ 3\cdot \:2\left(-4\right)&3\cdot \:2\cdot \:2&3\cdot \:2\cdot \:6\\ 3\cdot \:2\cdot \:6&3\cdot \:2\left(-5\right)&3\cdot \:2\cdot \:6\end{pmatrix}$

Simplify each element

$=\begin{pmatrix}-12&18&0\\ -24&12&36\\ 36&-30&36\end{pmatrix}$

Therefore, we conclude that:

$3\cdot \:2\begin{pmatrix}-2&3&0\\ -4&2&6\\ 6&-5&6\end{pmatrix}=\begin{pmatrix}-12&18&0\\ -24&12&36\\ 36&-30&36\end{pmatrix}$

Hence, option B is correct.

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