Answer: x= 7
Explanation:
Because they said the middle bisects both sides. There is a rule that says that line is half as big as the other line.
RS = 1/2 (UW) >Substitute
x + 4 = 1/2 ( -6 + 4x) > distribut 1/2
x + 4 = -3 + 2x >Bring like terms to 1 side
7 = x