Simplifying 7z + 5p = 9 Reorder the terms: 5p + 7z = 9 Solving 5p + 7z = 9 Solving for variable 'p'. Move all terms containing p to the left, all other terms to the right. Add '-7z' to each side of the equation. 5p + 7z + -7z = 9 + -7z Combine like terms: 7z + -7z = 0 5p + 0 = 9 + -7z 5p = 9 + -7z Divide each side by '5'. p = 1.8 + -1.4z Simplifying p = 1.8 + -1.4z