Solve for x -4 = x - 7

Mathematics

2 answers:

alexandr402 [8]3 years ago

7 0

X=3 next time try arranging it differently, it helps

Aneli [31]3 years ago

3 0

Answer:

x = 3

Step-by-step explanation:

- 4 = x - 7

- 4 + 7 = x

x = 3

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vivado [14]

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$cos(\theta)=\cfrac{\stackrel{adjacent}{-2}}{\underset{hypotenuse}{5}}\qquad \textit{let's find the \underline{opposite side}} \\\\\\ \textit{using the pythagorean theorem} \\\\ c^2=a^2+b^2\implies \sqrt{c^2-a^2}=b \qquad \begin{cases} c=hypotenuse\\ a=adjacent\\ b=opposite\\ \end{cases} \\\\\\ \pm\sqrt{5^2 - (-2)^2}=b\implies \pm\sqrt{25-4}\implies \pm\sqrt{21}=b\implies \stackrel{III~Quadrant}{-\sqrt{21}=b}$

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