Mathematics, 15.07.2019 11:00, mrflexington77

Anumber consists of two digits of which tens digits exceeds the unit digit by 7. the number itself is equal to 10 times the sum of its digits. find the number.

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Hi there!

Let the Original number be 10x + y.

Then,

• Ten's digit = x.
• Unit's digit = y.

According to th' Question :-

⇒x - 7 = y

⇒x - y = 7 ---(i)

And,

⇒10x + y = 10 (x + y)

⇒10x + y = 10x + 10y

⇒10x - 10x = 10y - y

⇒9y = 0

⇒y = 0

Substitute th' value of ' y ' in Eqn. (i)

⇒x - y = 7

⇒x - 0 = 7

⇒x = 7

∴ Original number = 10x + y = 10 × 7 + 0 = 70

Hence,
The required two digit number is 70

~ Hope it helps!

answered: Guest

ratios represent a pattern or relationship that can be scaled.

equivalent ratios are pairs of ratios that represent the same relationship between quantities, and can be generated by multiplying or dividing both quantities in the ratio by the same factor.

in this lesson, students will use double number lines and ratio reasoning to solve ratio problems. by partitioning double number lines into proportionate intervals, students will build an understanding of equivalent ratio relationships as those that are generated by multiplying or dividing two related quantities by the same number. this lesson will build upon students' prior understanding of multiplicative comparisons, number line reasoning and equivalent fractions (while highlighting the difference between equivalent fractions and equivalent ratios); and will build toward future work in this unit on building ratio tables, and work in future grades in proportionality, scaling, and expressing and graphing linear functions.

step-by-step explanation:

ratios represent a pattern or relationship that can be scaled.

equivalent ratios are pairs of ratios that represent the same relationship between quantities, and can be generated by multiplying or dividing both quantities in the ratio by the same factor.

answered: Guest

the answer is d

hope this

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Anumber consists of two digits of which tens digits exceeds the unit digit by 7. the number itself i...