11. 5(x + 1)-3(x+4)=5x÷3
12. x -2÷x+4 = 2
13. x+1÷x-2=4÷3
14. 3÷1 (x+9) - 5÷1 (x+5)= 4
15. 3÷x-4÷x=2
16. x -2÷x+1 - 5÷x-2 =2
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Answer:
11. X = 21
12. X = -1 + √3
14. X = -1
15. X = -1/2
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1
in the 13 th one, the first step is cross multiplying
please do check whether the 16 question that I wrote, is the way you meant it..if not.. please do refer to other sources
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