(9-x)/(x+3)=4

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`x`²	`x`^□	log_□	√☐	^□√☐	≤	≥	□□	·	÷	`x`^◦	π
(☐)^′	`ddx`	∂∂`x`	∫	∫_□^□	lim	∑	∞	`θ`	(`f` ◦ `g`)	`f`(`x`)

☐²

x^☐

√☐

^□√☐

□□

log_□

θ

∞

∫

ddx

≥	≤	·	÷	`x`^◦	(☐)	\|☐\|	(`f` ◦ `g`)	`f`(`x`)	ln	`e`^☐
(☐)^′	∂∂`x`	∫_□^□	lim	∑	sin	cos	tan	cot	csc	sec

simplify solve for inverse tangent line

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9−xx+3 =4

Solution

x=−35

Decimal

x=−0.6

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Solution steps

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9−xx+3 =4

Multiply both sides by x+3

9−x=4(x+3)

Expand 4(x+3): 4x+12

9−x=4x+12

Move 9 to the right side

−x=4x+3

Move 4x to the left side

−5x=3

Divide both sides by −5

x=−35

Verify Solutions

Find undefined (singularity) points: x=−3

Combine undefined points with solutions:

x=−35

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−▭▭	<	7	8	9	÷	`AC`
+▭▭	>	4	5	6	×	☐☐☐
×▭▭	(	1	2	3	−	`x`
▭ \|▭	)	.	0	=	+	`y`

(9-x)/(x+3)=4

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