6.EE.7: Solve One-Step Equations
Also written as 6.EE.B.7 and CCSS.MATH.CONTENT.6.EE.B.7 · Cluster: Reason about and solve one-variable equations and inequalities.
The Official Wording
Solve real-world and mathematical problems by writing and solving equations of the form x + p = q and px = q for cases in which p, q and x are all nonnegative rational numbers.
Common Core State Standards, Grade 6, Expressions & Equations · Read it at the source · Checked October 14, 2026
What 6.EE.7 Means in Plain English
Sixth graders write and solve equations in one move. A jacket plus $12 shipping comes to $50: x + 12 = 50, so subtract 12 from both sides and x = 38. Three notebooks cost $7.20: 3n = 7.20, so divide both sides by 3 and n = 2.40.
The numbers need not be whole: 2/3 of a tank is 10 gallons gives (2/3)x = 10, so x = 15. Students already guessed and checked in 6.EE.5. Now they undo the operation. In 7th grade the equations gain a second step, px + q = r (7.EE.4).
6.EE.7 I Can Statements
- I can write a one-step equation for a word problem.
- I can solve x + p = q by subtracting p from both sides.
- I can solve px = q with fractions and decimals too.
6.EE.7 Worked Example
A decimal price, a multiplication equation, and the solving move written as a question about undoing.
Four friends split a $9.80 pizza equally. Write and solve an equation to find what each friend pays.
- Name the unknown and write the equation. Four equal shares of m dollars make 9.80.4m = 9.80
- Ask what was done to m: it was multiplied by 4. Undo that by dividing both sides by 4, so the equation stays balanced.4m ÷ 4 = 9.80 ÷ 4
- Divide the decimal: 9.80 ÷ 4. Think 8 ÷ 4 = 2 and 1.80 ÷ 4 = 0.45.m = 2.45
- Answer the question in words, with the unit.Each friend pays $2.45
Check it: Substitute back: 4 × 2.45 = 9.80, the price of the pizza. Estimation agrees too: a $10 pizza split four ways is about $2.50.
Common Mistakes with 6.EE.7
Doing the operation instead of undoing it
x + 12 = 50, so x = 62
Try this: Ask what happened to x (12 was added) and do the opposite to both sides: 50 - 12 = 38. Then check 38 + 12.
Changing one side only
3n = 7.20, so 3n ÷ 3 = 7.20, n = 7.20
Try this: Draw a balance scale under the equation. Whatever happens to the left pan happens to the right: 7.20 ÷ 3 = 2.40.
Dividing by a fraction the wrong way
(2/3)x = 10, so x = 10 × 2/3 = 6 2/3
Try this: Multiply both sides by the reciprocal, 3/2, so the coefficient becomes 1: x = 10 × 3/2 = 15. Check: 2/3 of 15 is 10.
Where 6.EE.7 Fits
Practice 6.EE.7
Quick Check
- Solve y + 4.5 = 11.
- Solve 7k = 91.
- Nine tickets cost $67.50 in total. Write an equation and find the price of one ticket.