the sum of fathers age and twice the age of his son is 70 if we double the age of the father and add it to the age of his son the sum is 95 find their present ages
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Let the age of sons be x&that of fathers be y.
2x+y=70.................(1)
x+2y=95......................(2)
by adding equation no. (1)&(2)
3x+3y=165
x+y=55...................(3)
subtracting eq no.(2) from (1)
x-y=-25.................(4)
adding eqno. (3)&(4)
2x=30
x=15
substituting x=15 in eqno.(3)
y=40
son's age is 15&father's age is 40
2x+y=70.................(1)
x+2y=95......................(2)
by adding equation no. (1)&(2)
3x+3y=165
x+y=55...................(3)
subtracting eq no.(2) from (1)
x-y=-25.................(4)
adding eqno. (3)&(4)
2x=30
x=15
substituting x=15 in eqno.(3)
y=40
son's age is 15&father's age is 40
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