2 is 35
I’ll answer 1 in a second
Answer:
39
Step-by-step explanation:
Let x be tens place digit and y be units place digit.
Therefore, required number = 10x + y
On reversing the digits number so obtained = 10y + x
According to the given information:
10y + x = 10x + y + 54
10y + x - 10x - y = 54
9y - 9x = 54
9(y - x) = 54
y - x = 54/9
y - x = 6
y = x + 6...... (1)
Since, sum of the digits is 12.
Therefore, x + y = 12....(2)
From equations (1) & (2)
x + x + 6 = 12
2x = 12 - 6
2x = 6
x = 6/2
x = 3
y = x + 6 = 3 + 6 = 9...[from eqn (2)]
10x + y = 10*3 + 9 = 30 + 9 = 39
Thus, the required number is 39.
Answer:
-7 and -8
Step-by-step explanation:
Generally with this kind of problem it is helpful to construct equations representing the words.
Let's let:
Lesser integer = X
Greater integer = Y
The integers are consecutive, meaning that they are only one integer (number) apart. So,
Y = X+1
From the problem, we know that
Y = 9 + 2X
Now, we can sub in the equation from above.
(X + 1) = 9 + 2X
We now solve for X:
1 - 9 = 2X - X
-8 = X
Y = -8 + 1
Y = -7
Answbig
Step-by-step explanation:
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