elimination x+y=7, x-y=5

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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

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x+y=7, x−y=5

Solution

x=6, y=1

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Solve by:

Solve by elimination

Solve by substitution

Solve by Cramer's rule

Solve by Gaussian elimination

One step at a time

[

x+y=7

x−y=5

]

Subtract the equations

x−y=5

−

x+y=7

−2y=−2

[

x+y=7

−2y=−2

]

Solve −2y=−2 for y: y=1

For x+y=7 plug in y=1

Solve x+1=7 for x: x=6

The solutions to the system of equations are:

x=6, y=1

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

elimination x+y=7, x-y=5

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