Solving Equations Find the Mistake

Timmy is solving the equation ky + 3x = 8 for y.

Find his mistake!

• The mistake is between line 1 and 2.

• The mistake is between line 2 and 3.

• The mistake is between line 3 and 4.

• There is no mistake.

What is the value of x?

Rico tried to solve an equation algebraically. Find his mistake.

• Step 1 - He didn't do the same thing to both sides.

• Step 2 - He subtracted wrong.

• There is no mistake.

y - 4.6 = 12

• 16.6

• 5.8

• 7.4

• Answer not Given

x + (-3) = 4

• 7

• -7

• 1

• -1

Samara tried to solve an equation algebraically. Find her mistake.

• Step 2 - She added wrong.

• There is no mistake.

What would be the best first step to solving the equation?

• subtract   ¹/₁₀  from both sides

• subtract   -³/₅  from both sides

• add ¹/₁₀  to both sides

• add ³/₅ to both sides

Find the mistake in the work shown.

• Step 1: They distributed incorrectly.

• Step 2: They combined like terms incorrectly.

• Step 3: They combined unlike terms.

• Step 4: They divided instead of multiplying by 4.

After solving an equation, you should always...

• Check your work!

• Distribute

• Make a giant 1

• Make zero