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jmc

algebra junior

Problem

Moving along a particular line in the Cartesian plane, when the -value increases by 3 units, the -value increases by 7 units. When the -value increases by 9 units, by how many units will the -value increase?
Solution
If increasing the value by 3 units increases the value by 7, then increasing the value by units will increase the value by units.
Final answer
21