i need help with this i will give you 100 points

Answer:
10
Step-by-step explanation:
First we figure out the area of the triangle!
8 x 6 = 48
48/2 = 24
Now we multiply to figure out the area of the rectangle :)
24 x 5 = 120
Now we divide 120 by 12 to figure out the width!!
120/12 = 10
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Answer:
10
Step-by-step explanation:
area of triangle = 1/2 x 8 x 6 = 24
area of rectangle = 5 x 24= 120
area of rectangle = length x width
120 = 12 x w
w = 10