A two-digit number is such that the digit at tens place is twice the units digit. If the number is 36 more than the number formed by reversing the digits: (10t + u) - (10u + t) = 36 and t = 2u. Use substitution to find the units digit u.

Question

Accepted Answer

4. 9(t - u) = 36 means t - u = 4. Substitute t = 2u: 2u - u = 4, u = 4 (then t = 8, number 84).

A two-digit number is such that the digit at tens place is twice the units digit.
If the number is 36 more than the number formed by reversing the digits:
$(10 t + u) - (10 u + t) = 36$ and $t = 2 u$ .
Use substitution to find the units digit $u$ .

Step-by-Step Solution

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More Class 10 Substitution Method practice

A two-digit number is such that the digit at tens place is twice the units digit.If the number is 36 more than the number formed by reversing the digits:(10t+u)−(10u+t)=36 and t=2u.Use substitution to find the units digit u.

Step-by-Step Solution

Master this chapter in 30 minutes a day.

More Class 10 Substitution Method practice

A two-digit number is such that the digit at tens place is twice the units digit.
If the number is 36 more than the number formed by reversing the digits:
$(10 t + u) - (10 u + t) = 36$ and $t = 2 u$ .
Use substitution to find the units digit $u$ .