-26 -(-64) + (-93)
The double negative makes -64 positive, and adding -93 is the same as subtracting 93. Rewrite the expression.
-26 + 64 - 93
Now solve this simplified expression from left to right. Start by adding 64 to -26.
-26 + 64 = 38
Subtract 93 from 38.
38 - 93 = -55
Your answer is -55.