-3/8x - 2.5=10
+2.5 +2.5
3/8x= 12.5
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3/8
X= 12.5/(3/8)
There can only be 1 triangle , which would be obtuse and 180 degrees.
The terms appear to increase by a multiple of -2. The first 7 terms are:
-4 + 8 + -16 + 32 + -64 + 128 + -256. Add these together.
The sum of these numbers is -172.
You need to change around the values so that the letters are on one side whereas numbers on the other:
15 +7 = 8x - 6x
22 = 2x
x = 11.
Hope This Helps!
