Equations One Step

In the equation
x + 7 = 12
7 is being added to the variable, x. How should you show your work to isolate the variable and solve the equation? 

• Subtract 7 from both sides. The solution is x = 5.

• Add 7 to both sides.
  The solution is x = 19.

• Multiply both sides by 7 The solution is x = 84.

What is your first step when you solve  x + 5 = 12

• Add 5 to 5 and add 5 to 5 to 12

• Subtract 5 from 5 and subtract 5 from 12

• Subtract 12 from 12 and subtract 12 from 5

• Add 12 to 12 and add 12 to 5

Solve the equation
3x = 27. 

• x = 24

• x = 81

• x = 9

5 less than a number is 15.

• x - 5 = 15

• 5 - x = 15

• 15 - x = 5

x + 12 = 20

• x = 32

• x = -32

• x = 8

• x = -8

Solve...
3x - 7 = 32

• 13

• -13

• 12

• -12

Solve for w:
-6w + 1 = -11

• 2

• 1.2

• 12

• -2

Solve 7k - 14 = 42

• 7

• -8

• 0

• 8

Evaluate (solve).

y - 4.6 = 12

• y = 16.6

• y = 5.8

• y = 7.4

• Answer not Given

4x - 12 = -16

Mathematical Equivalence

ON