Answer:
x=-12
Step-by-step explanation:
Step 1: Simplify both sides of the equation.
80=4x+4(−4x−16)
80=4x+(4)(−4x)+(4)(−16)(Distribute)
80=4x+−16x+−64
80=(4x+−16x)+(−64)(Combine Like Terms)
80=−12x+−64
80=−12x−64
Step 2: Flip the equation.
−12x−64=80
Step 3: Add 64 to both sides.
−12x−64+64=80+64
−12x=144
Step 4: Divide both sides by -12.
-12x/-12=144/-12
x=-12
