pandu444 pandu444

03-12-2017
Mathematics

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Can some help with question 18 and an explanation please?? 20 points

Can some help with question 18 and an explanation please 20 points class=

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tynollette tynollette

03-12-2017

J=C+12
C=E+12
E=I+12
J+C+E+I=124
Substitute every unknown with C since C is the one we need to answer:

J=C+12
C=E+12 =>E=C-12
E=I+12 =>C-12=I+12 =>I=C-24
Now substitute
J+C+E+I=124
(C+12)+C+(C-12)+(C-24)=124
4C-24=124
4C=148
C=37

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