-4
Because 15x-7x= 8x
8x+5x= 13x
13x= -52
-52 / 13= -4
x = -4
<span>A trend line shows the general pattern of the data, but does not try to connect all the data points is the correct choice about trend lines. It usually is the most general direction of the points.</span>
You want the xs and the numbers on different sides.
2x-3x=-11-4
-x=-15
divide x by a -1
x=15
I'm thinking this is what the problem looks like:

. The first thing to do is to move the

over to the other side because it has a common denominator with the other side. Doing that and at the same time combining them over their common denominator looks like this:

. The best way to solve for x now is to cross-multiply to get 3(4-x)=-4(x-4). Distributing through the parenthesis is 12 - 3x = -4x + 16. Solving for x gives us x = 4. Of course when we sub a 4 back in for x we get real problems, don't we? Dividing by zero breaks every rule in math that there ever was! So, yes, the solution is extraneous.
Answer:
5 different orders. hope this help