From the given figure, we know that:

This means that the three sides of triangle MNO are congruent to three sides of triangle LMO. Therefore, the triangles are congruent by Side Side Side postulate.
We have:
5(x + 7) = 85 |divide both sides by 5
x + 7 = 17 |subtract 7 from both sides
x = 10
Step-by-step explanation:
distance between (12.-7) and (-3, -7)

=12+3
=15 units
Answer:
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Step-by-step explanation: