J is the midpoint of HK, this means that,
HJ=JK
Thus, our equation is
4x + 2 = 6x - 10
Let's solve for x
4x + 2 = 6x -10
collect like terms
4x - 6x = -10 - 2
-2x = -12
divide by -2
x = 6
b. HJ = 4x + 2 = 4(6) + 2 = 24 +2 = 26
c. GH = 5x = 5(6) = 30
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