Writing Equations
Write an equation for "Five more than a number is 12
x + 5=12
Solve for x: x + 5 = 12.
x = 7
Solve for x: 2x + 3 = 11.
x = 4
What is the value of x in the equation x + 2 = 6?
x = 4
What is the largest ocean on Earth?
Pacific Ocean
Write an equation for "Three times a number equals 21"
3x=21
Solve for x: 2x = 14
x = 7
Solve for x: 4x - 7 = 9.
x = 4
What is the coefficient in the expression 4x + 5?
4
Which animal is known as the "King of the Jungle"
Lion
If a number decreased by 9 equals 15, write the equation.
x − 9 =15
Solve for x: x - 4 = 10
x = 14
Solve for x: 3x + 4 = 10.
x = 2
What is the constant in the expression 7x - 3?
3
What is the largest planet in our solar system?
Jupiter
Write an equation for "The sum of twice a number and 4 is 18.
2x + 4 =18
Solve for x: 3x + 6 = 15
x = 3
Solve for x: 5x - 2 = 13.
x = 3
Define a variable in a mathematical expression.
A variable in a mathematical expression is a symbol, typically a letter, that represents an unknown or changing value.
What is the hardest natural substance on Earth?
Diamond
Create an equation to represent "The product of a number and 7 is 42.
7x = 42
Solve for x: 5x - 3 = 22
x = 5
Solve for x: 6x + 5 = 47.
x = 7
Explain what an equation is.
An equation is a mathematical statement that shows the equality of two expressions. It consists of two parts, separated by an equal sign (=). These two parts represent expressions that are equal in value.
In which country would you find the Great Barrier Reef?
Australia