Short Answer

Isolating Variables in Negative Sum Equations

A quality control technician is monitoring temperature changes in a refrigeration system. To find the change in two units where the total drop is -14 degrees, the technician uses the equation $2n - 4 = -14. According to the principles of solving linear equations, which specific mathematical operation (Addition, Subtraction, Multiplication, or Division) must be recalled and applied to both sides of the equation to begin isolating the $2n term?

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Updated 2026-04-16

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