In the given triangle △KRL \triangle KRL △KRL, MS MS MS is a midsegment. By definition, a midsegment in a triangle is parallel to one side of the triangle and half its length.
Since MS MS MS is a midsegment, it is parallel to KR KR KR and half its length. Therefore, we can set up the equation: MS=12KR MS = \frac{1}{2} KR MS=21KR
Given: KR=2x KR = 2x KR=2x MS=−10+2x MS = -10 + 2x MS=−10+2x
Substitute the given values into the equation: −10+2x=12(2x) -10 + 2x = \frac{1}{2} (2x) −10+2x=21(2x)
Simplify the equation: −10+2x=x -10 + 2x = x −10+2x=x
Subtract x x x from both sides: −10+x=0 -10 + x = 0 −10+x=0
Add 10 to both sides: x=10 x = 10 x=10
x=10 x = 10 x=10
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