Answer:
x = 2
Simple Algebraic Equations
Terminology
Variable: Any letter than stands for a value than can be solved and change value.
Coefficient: The number right before a variable (without being separated by an operator). It is a multiplication factor for a variable. Basically, it's just a way to express what you are multiplying a variable by,
If the coefficient is 1, it means [variable] * 1. 1[variable]
If the coefficient is 3, it means [variable] * x. 3[variable]
etc.
Constant: A fixed value (i.e. 3, 8, 1928). A variable is not a constant because if you were to add a coefficient (not including 0) to the start of a variable, the result would change depending on the value of the variable.
How to Solve
To solve, you must isolate the variable. It means moving the variable and it's coefficient to the other side of the equation with only the same variable on the same side with all the constants on the other side.
Do this with this rule that is extremely important in ALL of math beyond per-algebra and algebra.
Rule
If you multiply, divide, add, subtract, square root, exponent both sides of the equation by the same value, that end value stays the same. That is how you solve for it.
Q)
Subtract 4 on both sides to isolate the variable.
8 - 4 = 2x + 4 - 4
Simplify by combining like terms.
4 = 2x
Divide 2 on both sides to solve for x as the coefficient is currently 2.
Simplify.
x = 2