Answer:
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
