Variable Equations

Front

What is a variable in an equation?

Back

A variable is a symbol, often a letter, that represents an unknown number in an equation.

Tags

CCSS.6.EE.A.2B

Front

What does it mean for two equations to be equivalent?

Back

Two equations are equivalent if they have the same solution or represent the same relationship.

Tags

CCSS.8.EE.C.7A

Front

What is a solution to an equation?

Back

A solution to an equation is a value that makes the equation true when substituted for the variable.

Front

Is 0 a solution for the equation 2x + 5 = 5?

Back

Yes, substituting 0 for x gives 2(0) + 5 = 5, which is true.

Tags

CCSS.6.EE.B.5

Front

Is 20 a solution for the equation x ÷ 2 = 10?

Back

Yes, substituting 20 for x gives 20 ÷ 2 = 10, which is true.

Tags

CCSS.6.EE.B.5

Front

What is the process of solving an equation?

Back

The process of solving an equation involves finding the value of the variable that makes the equation true.

Tags

CCSS.7.EE.B.4A

Front

What does it mean to isolate a variable?

Back

To isolate a variable means to manipulate the equation so that the variable is on one side by itself.

Front

What is the equation for finding the value of y in y + 3 = 2?

Back

To find y, subtract 3 from both sides: y = 2 - 3, so y = -1.

Tags

CCSS.6.EE.B.7

Front

What is the equation for finding the value of y in 20 - y = 17?

Back

To find y, subtract 17 from 20: y = 20 - 17, so y = 3.

Tags

CCSS.6.EE.B.7

Front

What is the equation for finding the value of b in 18 = 3 + 3b?

Back

To find b, subtract 3 from both sides: 15 = 3b, then divide by 3: b = 5.

Tags

CCSS.7.EE.B.4A