Answer:
Explanation:
You want the value of x and the measures of sides RS and RT in the isosceles triangle with RS = 3x -5 and RT = 2x +7, both marked with a single hash mark.
Congruence
Sides RS and RT are marked as congruent, so we have ...
RS = RT
3x -5 = 2x +7
x = 12 . . . . . . . . . add 5-2x
Then the side lengths are ...
RS = 3(12) -5 = 31
The value of x is 12, and the missing side lengths are RS=RT=31.
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