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A triangle has one side that measures 12, another side that measures x, and a third side that measures 4 less than x. The perimeter is 26.

Which equation would we use to find the value of x?

1 answer

To find the value of x, we use the equation:

12 + x + (x - 4) = 26

Simplifying:

2x + 8 = 26

Subtracting 8 from both sides:

2x = 18

Dividing both sides by 2:

x = 9
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