Let the two numbers be x and y.
According to your question;
x + y = 7
10y + x = 10x + y + 9
By equation 1 ; x = 7-y
Substituting the value of x ;
10y + ( 7 -y) = 10(7-y) + y + 9
9y + 7 = 70 -10y + y + 9
9y + 7 = 70 - 9y + 9
=> 18y = 70 -7 + 9
=> 18y = 72
=> y = 4
Substituting for x ;
x = 7 - y
=> x = 7 -4
=> x = 3
Thus, x = 3 and y = 4;
=> The number is 34.
It is 2/3 because 16 divided by 8 is 2 and 24 divided by 8 is 3
2. - Kevins average speed is 67.5 mph
x = -25
<u>+25+25
</u>x + 25 = 0
<u>5(x+25) = 5(0)
</u>5x +125 = 0<u>
</u><u>
</u>
