2d + 7 = 9 

• 1
• 7
• 4
• 3

3 + 9n = 21

• 2
• -2
• 6
• 3

What would be the best first step to solving the equation?
-3=x+5

• add 3 to both sides
• subtract 5 from both sides
• add 5 to both sides
• subtract -5 from both sides

What would be the best first step to solving the equation?
-6x=-24

• multiply both sides by -6
• divide both sides by -6
• add 6  to both sides
• subtract -6  from both sides

Solve for x:

 $\frac{x}{3}-4=1$  

Solve for m:

   $7m-1=6$