a number consists of two digits of which tens digit exceeds the unit by 7. the number itself the equal to 10 times the sum of digits. find the number?
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0
Answer:
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Answered by
3
Answer:
original no. = 70
Step-by-step explanation:
let the unit digit be x
tens digit = x+7
original no. = 10(x+7)+x
10(x+7)+x= 10(x+x+7)
10x+70+x= 10(2x+7)
11x+70 =20x+70
20x-11x = 70-70
9x = 0
x = 0
no. = 10(x+7)+x
= 10(0+7)+0
= 10*7
70
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