book Maths Puzzle Numerical Ability

I dont understand why the 7 in the problem stays 7 in the answer.Why dont you multiply it by 7 making it 49?

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Hi Tutors:

I undersand Absolute Value quite well, however I need some help with this problem. Can someone please help me understand this one. Thanks
2|2x-7|+11=25 Do I use the 5-2(x-3)=2+4(x-1)-3x