Collect the unknown on one side, expand brackets first, and cope with negative and decimal coefficients.
What you will learn
- Solve with x on both sides
- Expand brackets then solve
- Solve with decimal coefficients
Collect the x terms
Take the smaller x term away from both sides, so the x term stays positive.
- 7x − 4 = 3x + 16
- subtract 3x: 4x − 4 = 16
- add 4: 4x = 20
- x = 5
The rest of this lesson and its 7 practice questions are locked.
In this lesson
- Collect the x terms
- Expand first
- Try it: Check with the solver
7 practice questions, marked as you go; about 25 minutes in all.
In this unit: Linear equations and inequalities
Solve linear equations of every shape, including brackets and fractions, form equations from problems, and solve and show inequalities.
- Solving one- and two-step equations
- Unknowns on both sides and brackets
- Equations with fractions
- Forming and solving equations
- Linear inequalities