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.
-4 +5 -5 + 4
negative 5
It equals -9
C equals negative 1
-4 x 5
-4 - 1 = -4 + (-1) = -5
The answer to the math problem of 18 minus 4x equals negative 2 is x equals 5.
-4
x= Negative 4
-5 + √21 ≈ -0.4174 -5 - √21 ≈ -9.5826
7.75
It equals to yo mama