Algebra - Substitution

May 29th, 2015
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"Substitute" means to put in the place of another.In Algebra "Substitution" means putting numbers where the letters are:If you have: x – 2 = 4 And you know that x=6 ...... then you can "substitute" 6 for x: 6 – 2 = 4

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Algebra - Substitution(source : mathisfun.com)"Substitute" means to put in the place of another.SubstitutionIn Algebra "Substitution" means putting numbers where the letters are:If you have:x 2 = 4And you know thatx=6...... then you can "substitute"6forx:6 2 = 4Example 1:If x=5 then what is10/x + 4?Put "5" where "x" is:10/5+ 4 = 2 + 4 = 6Example 2:If x=3 and y=4, then what isx2+ xy?Put "3" where "x" is, and "4" where "y" is:32+34= 9 + 12 = 21Example 3:If x=3 (but you don't know "y"), then what isx2+ xy?Put "3" where "x" is:3

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