Let the four numbers be A,B,C,D in ascending order.
The key is in conditions 2 & 3.
B-C=-4, and B+C=0
therefore B=-2, C=2 by solving the two previous equations.
Given that the product of the two greatest numbers is 6, we have C*D=6, or
D=6/C=6/2=3
Now since the sum of all the four numbers is -6, we have
A+B+C+D=-6
A-2+2+3=-6
A=-6+2-2-3=-9
Check: we were told smallest divided by greatest = A/D=-9/3=-3 ok.
So the numbers are
A=-9, B=-2, C=2, D=3.
Let x be the number of rocks that George have at first.
First, George have x rocks. Then, he gets 5 new rocks. So, we have:
Next, half of his rock collection is given to Susan.
Susan got 36 rocks, so the equation is
Answer:
See below
Step-by-step explanation:
9x-7=0
We want to isolate the variable, or in other words, get x alone.
The first step is to add 7 to each side to get the constant on one side and the variable on the other
9x-7+7 = 0+7
9x =7
The since we are multiplying x by 9, we need to do the opposite to isolate it. We will divide by 9. What we do to one side, we do to the other. Divide both sides by 9
9x/9 = 7/9
x =9
We have successfully isolated the variable and solved for x.
D I think, idk really I'm just guessing
