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Standards/Math/Alabama/7.9.a

7.9.a

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.
7.9.a
7.9.b

Solve word problems leading to equations of the form px + q = r and p(x + q) = r, where p, q, and r are specific rational numbers. Solve equations of these forms fluently. Compare an algebraic solution to an arithmetic solution, identifying the sequence of the operations used in each approach.

Example Problems
Solve for x:
−9x=63
Solve for x:
1.5x=−9
Solve for x:
−2x=6
Khan Academy Resources
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