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a grandmother says her grandson is two years older years older than her ganddaughter and that together , they are at least 12 years old. How old are her grandson and granddaughter?
This is a inequality word problem

Sagot :

alienewissert
 let x represent granddaughter and x +2 for grandson and together they = 12
 so then we have the equation of x+2+x = 12
 combine like terms 2x +2 =12
-2 from both sides to isolate x
2x=10  divide both sides by 2 to get x by itself 
so we get x = 5 then add 2 +5=7 
so grandson is 7 and granddaughter is 5
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