Question

What are the solutions to the equation

4x+21=-(1/3)^x+4 +6


a. x=-6 and x=-4

b. x= -6 and x = -5.75

c. x=3 and x= -5

d. x= -6 and x =3

Answer 1

a. x=-6 and x=-4

Explanation:

To solve the equation, graph the left side y = 4x + 21 as a line.

Then graph the right side y = 1/3^ (x+4) + 6.

Where the two intersect are the solutions.