Solve the equation
21/4^x +9/8=2

Step-by-step explanation:    

Step 1: Add (-9)/8 to both sides.

(21/4) ^x + 9/8 = 2

(21/4) ^x + 9/8 + -9/8 = 2 + -9/8

(21/4) ^x = 7/8

Step 2: Solve Exponent.

(21/4) ^x = 7/8

x = log (7/8) by log (21/4)

x=−0.080527

Explanation in words:  

The first step is to Add (-9)/8 to both sides of the question. In the end, the answer will result as (21/4) ^x = 7/8.

The second step is to solve the equation by using log. Formula for log is log = x. For base. At the end we solve all the exponents and the answer will end up being x=−0.080527.

Graph: See Attachment

x=−0.080527  

Hope this helps.

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step-by-step explanation:

an equation by definition has to have two or more variables (x and 2 in this case)