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VLD [36.1K]
3 years ago
15

In a two-digit number, the tens' digit is 1 less than the units' digit. If the digits are

Mathematics
1 answer:
Tomtit [17]3 years ago
6 0

Answer:

67

Step-by-step explanation:

Number: AB

A = B-1

BA + AB = 143

10*B + A + 10*A + B = 143

11A + 11B = 143

A + B = 13

(B-1) + B = 13

2B = 14

B = 7

A = 6

The number is 67

check: 6 = 7-1   and   67 + 76 = 143

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Check out the attached image for the drawing of how this would look. The drawing isn't 100% needed but it helps I think. 

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3 years ago
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Graph:

Attached below

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