solve equations

Front

Solve for x: 8x - 10 = -34

Back

x = -3

Front

Write an equation: A number is doubled, then 9 is added. The result is 23.

Back

2x + 9 = 23

Front

Solve: 9 + 3x = 10

Back

x = 1/3

Front

Find the error in the problem: 19 - 2k = 3k - 1. The steps are: +3k, 19 + 1k = -1, -19, k = -20.

Back

Instead of adding 3k they should subtract 3k.

Front

What is the first step in solving this equation: 5x + 7 = 12?

Back

Subtract 7.

Front

What does it mean to solve an equation?

Back

To find the value of the variable that makes the equation true.

Front

What is a variable in an equation?

Back

A symbol (usually a letter) that represents an unknown number.

Front

What is the purpose of isolating the variable in an equation?

Back

To find the value of the variable by getting it alone on one side of the equation.

Front

What is the inverse operation of addition?

Back

Subtraction.

Front

What is the inverse operation of multiplication?

Back

Division.