Answer: r=6
Step-by-step explanation:
Because if 42 equals 7 times r you just have to divide 42 by 7.
Answer:
6
[tex]42=7r[/tex]
Switch sides
[tex]7r=42[/tex]
Divide both sides by 7
[tex]\frac{7r}{7} =\frac{42}{7}[/tex]
Simplify
[tex]r=6[/tex]
