Bob's age is twice that of Barry's. Five years ago, Bob was three times older than Barry. Find the age of both.

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

☐²

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log_□

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

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The sum of two numbers is 249 . Twice the larger number plus three times the smaller number is 591 . Find the numbers.

Solution

The numbers: 156, 93

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Solution steps

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cos(x)1−sin(x) =sec(x)+tan(x)

Thao tác bên phải

sec(x)+tan(x)

Biểu diễn dưới dạng sin, cos

=1+sin(x)cos(x)

Viết lại bằng cách sử dụng hằng đẳng thức lượng giác

=cos(x)1−sin(x)

Chúng tôi đã cho thấy rằng hai bên có thể có cùng một dạng

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CHÀO, hỏi một câu hỏi về The sum of two numbers is 249 . Twice the larger number plus three times the smaller number is 591 . Find the numbers.

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

Bob's age is twice that of Barry's. Five years ago, Bob was three times older than Barry. Find the age of both.

Solution

Solution steps

Number Line