3 1/2x + 215 = 495 Multiply both sides of simplified equation to get X alone on the left side of the equation. Simplify.

Step-by-step explanation:

The equation is not well presented but I assume the equation is

3½x + 215 = 495

Converting the mixed fraction to improper fraction

Then, we have

7x/2 + 215 = 495

To eliminate the fraction aspect we will multiply both the right hand side and the left hand side by 2

2 (7x/2 + 215) = 2*495

Open bracket

7x + 430 = 990

Subtract 430 from both sides of equation

7x + 430-430 = 990-430

7x = 560

Divide both sides by 7

7x/7 = 560/7

x = 80

The value of the unknown x is 80