Given the equation 4x + 7 = 3(2x − 5), solve for the variable. Explain each step and justify your process.
B.Sam solved a similar equation below. Is Sam's solution correct? Explain why or why not.
5x − 1 = 2(x + 4)
5x − 1 = 2x + 8
7x − 1 = 8
7x = 7
x = 1