Solve an Equation Review

12x - 15 = 3(2x+3)

• x = 4

• x = -4

• x = 2

• x = -2

An equation is...

• a problem that contains at least one variable and at least one operation; no equal sign

• a mathematical sentence showing two expressions are equal.

• The solution for a variable

• The value that results in a true sentence

The objective when solving an equation is to....

• isolate the variable.

• check the solution.

• guess and check.

• Combine Like Terms.

A solution is...

• A variable that results in a true sentence

• A mathematical sentence showing two expressions are equal.

• Numbers expressed using exponents

• The value for the variable in an equation.

What is the solution of 9 + k = 18

• 18

• 9

• 8

• 7

What is the solution of 3w = 30

• 6

• 9

• 10

• 12

The variable, k, is being divided by 11. How should you show your work to isolate the variable?

• Divide both sides by 11

• Multiply both sides by 11.

• Add 11 to both sides.

• Subtract 11 to both sides.

What is the first step to solve this equation:
11 - 3x = 44

• Add 3 to both sides

• Subtract 11 from both sides

• Add 11 to both sides

• Divide 3 on both sides.

Solve    2x -7 = -23

• -8

• 8

• -7

Solve: 3(x-4) = -3

• 3

• -3

• 5

• -5