Q 24 (i) From the sum of 13x - 8y +11 and - y - 11, subtract 3x – 3y – 11.
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(13x-8y+11)+(-y-11)-3x-3y-11
=>(13x-8y-y+11-11)-3x-3y-11
=>13x-9y-3x-3y-11
=>13x-3x-9y-3y-11
=>10x-12y-11
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