12/2 = 6, so;
7x-1 = 6
7x = 7
x = 1
Because both sides are equal, you do the same for 2x+4
2x+4 = 6
2x = 2
x = 1
Answer:

Step-by-step explanation:
The number of red marbles in the bag is;
.
The number of blue marbles in the bag is;
.
The number of white marbles in the bag is;
.
The total number of marbles in the bag is:
.
The probability of selecting a blue marble is 
We substitute the given information to obtain:

We simplify to obtain:

<span> Coefficients are numbers used to multiply a variable.
IN this case, the coefficients are -8, 12 and 5.
</span>
Answer:
;-;
Step-by-step explanation:
Ello
What type of prism? triangular? Rectangular?