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3 years ago

-7x+5=-16 what is the answer

Mathematics

2 answers:

vova2212 [387]3 years ago

6 0

The answer would be x= 3

koban [17]3 years ago

3 0

First move +5 to to the other side.

-7x=-16-5

-7x=-21

Then after this devide both sides by negative seven.

X=3

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Answer:

A and B

Step-by-step explanation:

we would like to solve the following equation:

$\rm\displaystyle 5 - 2x = \sqrt{ {2x}^{2} + x - 1 } - x$

to do so isolate -x to the left hand side and change its sign:

$\rm\displaystyle 5 - 2x + x = \sqrt{ {2x}^{2} + x - 1 }$

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swap the equation:

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$\displaystyle \begin{cases}x _{1} = 2\\ x_{2} = - 13 \end{cases}$

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