Question

x + 2x + 7 = 3x - 7

Explanation:

Step1: Combine like terms on left

$x + 2x + 7 = 3x + 7$

Step2: Set equal to right side

$3x + 7 = 3x - 7$

Step3: Subtract $3x$ from both sides

$3x - 3x + 7 = 3x - 3x - 7$
$7 = -7$

Answer:

No solution (since $7=-7$ is a false statement, there is no value of $x$ that satisfies the equation)