Formula

Division Property of Equality

The Division Property of Equality states that dividing both sides of an equation by the same nonzero number preserves the equality. For any numbers aa, bb, and cc with c0c \neq 0:

If a=ba = b, then ac=bc\frac{a}{c} = \frac{b}{c}

This property is used to solve equations in which the variable is multiplied by a coefficient. To isolate the variable and "undo" the multiplication, both sides are divided by that coefficient. For example, when solving an equation like 7x=567x = 56, dividing both sides by 77 yields x=8x = 8, because 7x7=x\frac{7x}{7} = x and 567=8\frac{56}{7} = 8. The restriction c0c \neq 0 is essential because division by zero is undefined.

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Updated 2026-04-21

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