Solving Expressions with Variable

Which equation has x = 5 as the solution?

• x + 15 = 10

• 2x = 5

• 2x = 10

What is the correct step to solve for the variable?
15 = m - 5

• add 15 to both sides

• add 5 to both sides

• subtract 15 from both sides

• subtract 5 from both sides

What are the two basic rules for solving algebraic equations?

• Whatever you do to one side of the equal sign, you must copy and do on the other side of the equal sign

• Negative signs can be ignored

• Always start on the left side, regardless of where the variable is

• Always do the opposite operation

What do you call the number in front of a variable that is being multiplied?

• Constant

• Variable

• Coefficient

• Equation

The goal when solving an equation is to

• find what the variable is.

• check the solution.

• guess and check.

• combine like terms.

What is the correct step to solve for the variable?

• add 15 to both sides

• add 5 to both sides

• subtract 15 from both sides

• subtract 5 from both sides

What is the correct step to solve for the variable ?

• subtract 7 from both sides.

• add 7 to both sides.

• multiply both sides by 7

• divide both sides by 7

What is the correct step to solve for the variable ?

• add 62 to each side.

• subtract 62 from each side.

• multiply each side by 62.

• divide each side by 123

What is the correct step to solve for the variable?

• add 25 to both sides

• subtract 25 to both sides

• divide 25 on both sides

• multiply 25 on both sides

What is the correct step to solve for the variable ?

• add 11 to both sides

• subtract 11 from both sides

• divide 11 to both sides

• multiply 11 to both sides