Algebra 1 - Unit 5 - Lesson 1

When solving an equation, the goal is to ______ the variable.

• Multiply

• Divide

• Add

• Isolate

Is 8 a solution to the equation 3(x - 2) + 5 = 23? Justify your answer.

• Yes, because when we substitute x = 8 into the equation, both sides are equal.

• No, because when we substitute x = 8 into the equation, both sides are not equal.

• Yes, because when we substitute x = 8 into the equation, the left side is greater than the right side.

• No, because when we substitute x = 8 into the equation, the left side is less than the right side.

Solve for x. Put answer in to an improper fraction.

-0.6x + 0.7 = 0.3x - 6

• 67/9

• 53/9

• -67/9

• -53/9

Solve for m.

10m - 9 = 6m - 5

Mathematical Equivalence

ON

Mathematical Equivalence

ON

• -4/3

• 4/3

• -3/4

• 3/4

• -3/22

• -22/3

• -2/11

• -11/2

Mathematical Equivalence

ON

Two students, James and Joe were solving the equation 6 - 5 (11 - 2x) = 17x. Their work is shown. 3. Which student made an error?

• James

• Joe

Two students, James and Joe were solving the equation 6 - 5 (11 - 2x) = 17x. Their work is shown. 3. What was the mistake of the student that messed up?

• distributed first

• subtracted first

• added first

• divided first