7.9
Use variables to represent quantities in real-world or mathematical problems and construct algebraic expressions, equations, and inequalities to solve problems by reasoning about the quantities.
Khan Academy ResourcesOne-step inequalities reviewTwo-step equations reviewOne-step inequalitiesTwo-step equationsTwo-step inequalitiesTwo-step inequality word problemsTwo-step equations word problemsFind the mistake: two-step equationsTwo-step equations with decimals and fractionsEquation word problem: super yoga (2 of 2)Equation word problem: super yoga (1 of 2)Two-step equation word problem: computersTwo-step equation word problem: gardenOne-step inequalities: -5c ≤ 15Two-step equations with decimals and fractions One-step inequalities examplesWorked example: two-step equationsTwo-step inequality word problem: applesTwo-step inequalities One-step inequality word problemTwo-step inequality word problem: R&BTwo-step equations intuitionIntro to two-step equationsTwo-step equation word problem: orangesFind the mistake: two-step equations

1-on-1 AI tutoring aligned to 7.9. Instant help for students, real-time insights for teachers.
Used in classrooms by 100,000+ students at Baltimore County, Plano ISD, Deer Valley USD, KIPP, and districts nationwide.
Free for teachers, forever →