anonymous 4 years ago Solve using the multiplication principle. -6a = 42

1. anonymous

Multiply both sides by $$\large -\frac{1}{6}$$.

2. anonymous

3. anonymous

a= -7

4. anonymous

$\cancel{-6}a\cdot \cancel{\frac{-1}{6}}=42\cdot (-\cancel{\frac{1}{6})} \implies a=\frac{-42}{6}=-7.$

5. anonymous

Lol, there's no need for that last cancellation line.