Solving Equations in One Variable

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?
-4.4=-4y

• multiply both sides by -4

• divide both sides by -4

• add 4 to both sides

• subtract 4 from both sides

What would be the best first step to solving the equation?
f+6=-6

• multiply both sides by 6

• divide both sides by 6

• add 6 to both sides

• subtract 6  from both sides

y - 4.6 = 12

• 16.6

• 5.8

• 7.4

• Answer not Given

1. Kylie and Ricardo decide to start a dog watching business for their neighborhood. 

3. Kylie thinks it would be best to charge customers $27 for a membership and then $5 per time they walk a dog. 

5. Ricardo thinks it would be best to charge $8 per dog walk. 

7. For what number of walks will their two plans cost the same amount of money?

Mathematical Equivalence

ON

Solve for x:
2x + 5 = 12

• 7

• 3

• 3.5

• 8.5

Kylie and Ricardo decide to start a dog watching business for their neighborhood. Kylie thinks it would be best to charge customers $27 for a membership and then $5 per time they walk a dog. Ricardo thinks it would be best to charge $8 per dog walk. For what number of walks will their two plans cost the same amount of money?

Mathematical Equivalence

ON

The perimeter of the rectangle shown is 36 inches. Solve for the value of x.

Tip: just type in the number.

Mathematical Equivalence

OFF

What is the goal when solving an equation?

• circle the final answer

• isolate the variable

• use a calculator

• ask for help

Which equation has x = 5 as the solution?

• x + 15 = 10

• 2x = 5

• 2x = 10