Answer:
Let x be no. of movies watched.
PART A: 10 + 1x
PART B: 15+0.5x
10+1x=15+.50x
10+1x-(15+.50x) =0
1x-(.50x+15) +10=0
x-(.50x+15) +10=0
x-.50x-15+10=0
0.5x-5=0
0.5x=5
x=5/0.5
x=10
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