Question

1. $1 - 12x=-20 - 9x$

Explanation:

Step1: Move like - terms to one side

Add \(9x\) to both sides: \(1-12x + 9x=-20-9x + 9x\), which simplifies to \(1 - 3x=-20\).

Step2: Isolate the term with \(x\)

Subtract 1 from both sides: \(1-3x - 1=-20 - 1\), resulting in \(-3x=-21\).

Step3: Solve for \(x\)

Divide both sides by \(-3\): \(\frac{-3x}{-3}=\frac{-21}{-3}\), so \(x = 7\).

Answer:

\(x = 7\)