Explanation:
-9j = 6j - 2 (5j + 5)
-9j = 6j - 10j - 10
-9j = -4j - 10
-9j + 4j = -10
-5j = -10
j = -10 / -5
j = 2
Answer:
-9j=6j-2(5j + 5)
-9j-6j=-2(5j+5)
-15j=-10j -10
-15j+10j=-10
-5j=-10
-5j/-5 =-10/-5
j=2
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