Grandmother 80795

The grandmother is 4 times older than the grandson. In 7 years, it will be only 3 times. How old is grandma?

Correct answer:

x =  56

Step-by-step explanation:

x=4y x+7=3(y+7)  x=4 y x+7=3 (y+7)  x4y=0 x3y=14  Row2Row1Row2 x4y=0 y=14  y=114=14 x=0+4y=0+4 14=56  x=56 y=14

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