Question 172342
first lets label each person with a variable...lets call Jonah h Joelle e and aziza a
:
h=2e+1....eq 1----->e=(h-1)/2...revised eq 1
h=1/2a+5..eq 2----->a=2h-10.....revised eq 2
(h+6)+(e+6)+(a+6)=60...eq 3----->h+e+a=42.....revised eq 3
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now take values from revised eq 1 and 2 and plug them into revised eq 3
:
h+(h-1)/2+2h-10=42.....multiply all terms by 2
:
2h+h-1+4h-20=84......combine terms
:
7h=105
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{{{highlight(h=15)}}}Jonah's age
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{{{highlight(e=(15-1)/2=7)}}}Joelle's age
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{{{highlight(a=2(15)-10=20)}}}aziza's age
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