Solve Two Step Equations

Did Sarah make an error? If so, which is the best description of her error?

• She didn't distribute correctly. The second step should read 3x - 12 = 24

• She didn't distribute correctly. The second step should read -3x - 12 = 24

• She didn't distribute correctly. The second step should read -3x + 12 = 24

• She didn't make an error.

Solve for x.

2(x + 15) = -6

• x = -10.5

• x = -18

• x = 18

• x = 10.5

Solve for x:
-30 - 5x = 120

• x = 18

• x = -18

• x = 30

• x = -30

Solve for y.

• y = -5.6

• y = 5.6

• y = -8.75

• y = 8.75

Mathematical Equivalence

ON

• x=3

• x=-7

• x=0

• No Solution

• x=-10

• x=2

• No Solution

• All Real Numbers

• x=3

• x=2

• x=-2

• x=1

Mathematical Equivalence

ON

• 0

• 1

• -1

• 4