Example

Checking the Solution of 9x58x6=7{}9x - 5 - 8x - 6 = 7

To verify that x=18x = 18 is the correct solution to the equation }9x - 5 - 8x - 6 = 7{, substitute 18 for every instance of xx in the original equation and simplify both sides to check if they are equal:

9(18)58(18)6=?7{}9(18) - 5 - 8(18) - 6 \stackrel{?}{=} 7

16251446=?7{}162 - 5 - 144 - 6 \stackrel{?}{=} 7

1571446=?7{}157 - 144 - 6 \stackrel{?}{=} 7

136=?7{}13 - 6 \stackrel{?}{=} 7

7=7{}7 = 7

Since the resulting statement is true, the solution x=18x = 18 is confirmed.

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Updated 2026-04-21

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