Answer:
x = -5
Step-by-step explanation:
f(x) = -4x - 10 and f(x) = 10
Step 1: Substitute 10 for f(x)
10 = -4x - 10
Step 2: Add 10 to both sides to get x alone
10 = -4x - 10
+10 +10
20 = -4x
Step 3: Divide both sides by -4 to get x alone
20 = -4x
-4 -4
x = -5
