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ACT Math Elementary Algebra: Drill 1, Problem 3. Solve for y using substitution.
Math Elementary Algebra: Drill 1, Problem 4. Solve for y using substitution.
Math Elementary Algebra: Drill 1, Problem 5. Solve for a using substitution.
ACT Math Section: Elementary Algebra Drill 2, Problem 5. Use these two equations to solve for both x and y.
ACT Math: Elementary Algebra Drill 3, Problem 1. Solve for a, given the two equations in the video.
ACT Math: Elementary Algebra Drill 3, Problem 2. Solve for z, when x = 2 and y = 5.
ACT Math: Elementary Algebra Drill 5, Problem 5. How much 10% solution must be added to yield the correct concentration?