Rakhelp's answer to Jess's Primary 4 Maths Singapore question.

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Rakhelp
Rakhelp's answer
6 answers (Tutor Details)
no. with helen=a
gwen has (a+45)
Isabel has (a+14)

total=137=a+(a+45)+(a+14)
137=3a+59
3a=78
a=26

Helen has 26
Gwen has 71
Isabel has 40