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3 years ago

5x -4= 4x please help me

Mathematics

2 answers:

nadezda [96]3 years ago

5 0

$5x-4=4x\\\\5x-4x=4\\\\\huge\boxed{x=4}$

Phoenix [80]3 years ago

5 0

Answer:

4=x

Step-by-step explanation:

5x-4=4x

-4=-x

4=x

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What is the answer for 4i over 3+7i

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Answer:

see explanation

Step-by-step explanation:

given $\frac{4i}{3+7i}$

To rationalise multiply the numerator/denominator by the conjugate of the denominator

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$\frac{4i(3-7i)}{(3+7i)(3-7i)}$

distribute the numerator/denominator

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[ note that i² = - 1 ]

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= $\frac{28+12i}{58}$

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3 years ago

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Afina-wow [57]

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Given the following system of equations:

kompoz [17]

Answer:

(D) Divide the first equation, $-4x + 8y = 16$ , by 2.

Step-by-step explanation:

Given:

$-4x + 8y = 16 \ \ \ \ equation \ 1$

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We need to find the operation performed on equation so as to get resultant equation as:

$-2x + 4y = 8$

$2x + 4y = 8$

From Above we can see that there is no change in equation 2 with respect to resultant equation.

Also Resultant equation is simplified form of equation 1.

Simplifying equation 1 we get;

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Hence we will divide equation 1 with 2 we get

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