278.15 K
5oC = (9/5 x 5) + 32oF = 9 + 32oF = 41oF
a + c - b = 3 + 2 - 5 = 5 - 5 = 0
16.67 degees C
If a = -15, b = 5 and c = -2 a - b - c = -15 - 5 - (-2) = -20 + 2 = -18
C equals negative 1
6 + 12 - 5 = 13
Just substitute the "c" with 4 and the "a" with negative 5, as c=4 and a=-5. So the equation is 4-(-5) which is simply 4+5. And the rest you should be able to do from there.
250 K = -23.15 C
t = 4/5
-15°C = 5°F-15°C multiplied by 1.8 +32 = 5°F
Angles:degrees Temp.: degees C, degrees F, or kelvins
C = 5