In this equation, x is the variable, which essentially means that its a placeholder for a number. When there is only one variable in an equation, you can typically solve to find its value.
To solve for x, you will want x alone on one side of the equation. Start by using PEMDAS (Parentheses, Exponents, Multiplication/Division, Addition/Subtraction) to combine the numbers. So, start in the parentheses and multiply those 2 numbers.
x + (16) -2 = 4
Then, complete the subtraction on the left side of the equation.
x + 14 = 4
Subtract 14 from both sides of the equation to get x alone. I'm showing intermediate steps here. If you need, I would recommend writing the subtraction from both sides directly under the values you're subtracting it from, like shown below.
x + 14 = 4
x + 0 = - 10
x = -10
You can then plug this value for x back into the original equation to check that its the right answer and that there were no math errors.
(-10) + (2*8) - 2 = 4
-10 + 16 - 2 = 4
6 - 2 = 4
4 = 4
Since 4 = 4 is a true statement, the x value is correct.