Question: - 2 i 4 . 5 F B + 2 i 7 F c = 0 - 6 j 6 . 5 F B -

-2i4.5FB+2i7Fc=0
-6j6.5FB-6j7Fc+6j4.5FD=0
1.5k6.5FB+3k7FC+2.5(K)4.5FD-400=0
i need a step by step
- 2 i 4 . 5 F B + 2 i 7 F c = 0 - 6 j 6 . 5 F B -

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