Writing a word sentence as an equation

Front

What is a variable in mathematics?

Back

A symbol, often a letter, that represents an unknown number or value.

Front

What does it mean to 'solve an equation'?

Back

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

Front

Write an equation for: 'A number x decreased by 5 equals 10.'

Back

x - 5 = 10

Front

What operation does '3y' represent?

Back

Multiplication.

Front

Solve for x: 2x + 3 = 11.

Back

x = 4.

Front

Write a mathematical sentence for: 'The sum of a number m and 7 is 15.'

Back

m + 7 = 15.

Front

What does 'increased by' indicate in a mathematical sentence?

Back

It indicates addition.

Front

Solve for g: 4g = 20.

Back

g = 5.

Front

Write an equation for: 'Five less than a number n is 12.'

Back

n - 5 = 12.

Front

What does 'decreased by' indicate in a mathematical sentence?

Back

It indicates subtraction.