Writing Equations
Write an equation for "Five more than a number is 12
x + 5=12
Write an equation for "Three times a number equals 21"
3x=21
If a number decreased by 9 equals 15, write the equation.
x − 9 =15
Write an equation for "The sum of twice a number and 4 is 18.
2x + 4 =18
Create an equation to represent "The product of a number and 7 is 42.
7x = 42