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Sagot :
Jeremy - x
Older sister - x+5
Younger sister - x-4
3x+1=49
3x=48
X= 16
Jeremy: 16
Older sister: 21
Younger sister: 12
Older sister - x+5
Younger sister - x-4
3x+1=49
3x=48
X= 16
Jeremy: 16
Older sister: 21
Younger sister: 12
Jeremy=x
Older sister=x+5
younger sister=x+5-9 or x-4
x+(x+5)+(x-4)=49
combine like terms
3x+5-4=49
3x+1=49
subtract 1 from both sides
3x=48
divide both sides by 3
x=16
Jeremy=16
Older sister=16+5=21
younger sister =16-4 or 16+5-9=12
J=16
OS=21
YS=12
Older sister=x+5
younger sister=x+5-9 or x-4
x+(x+5)+(x-4)=49
combine like terms
3x+5-4=49
3x+1=49
subtract 1 from both sides
3x=48
divide both sides by 3
x=16
Jeremy=16
Older sister=16+5=21
younger sister =16-4 or 16+5-9=12
J=16
OS=21
YS=12
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