7 hours later.
If her rate is
6km/hour
then if we do some simple math
6/1=42/7
In 7 hours Amanda will b finished with the marathon
A distance from zero that’s a number is on the number line. (The absolute value is never negative)
So your number is z and you want 9 less z-9
The equation given in the question has one unknown variable in the form of "x" and only one equation is required to find the value of the unknown variable. So it is absolutely possible to find the exact value of "x".
6(-3 - x) - 2x = 14
-18 - 6x - 2x = 14
-18 - 8x = 14
Multiplying both sides of the equation by -1 we get
8x + 18 = - 14
Dividing both sides by 2 we get
4x + 9 = - 7
4x = - 7 - 9
4x = - 16
x = - 16/4
= - 4
So the value of "x" comes out to be equal to - 4. I hope the procedure is clear enough for you to understand.
