Identify like terms: Terms that have the same variable and exponent (3x and 5x).
Group them: Put like terms next to each other.
Combine the coefficients: Add or subtract the numbers in front of the variables.
Write the simplified expression.
Simplify 3x+5x−2+4
Combine 3x+5x=8x
Combine −2+4=2
Simplified: 8x+2
thats it!