Question 1173014
My present age = x
My grandmother's present age = x + 50
<pr>
9x - 3(x + 50) = -60
<pr>
9x - 3x - 150 = -60
<pr>
6x = 90
<pr>
x = 15
<pr>
My present age = x = 15
My grandmother's present age = x + 50 = 15 + 50 = 65
<pr>
My age last year = 15 - 1 = <b>14</b>
My grandmother's age last year = 65 - 1 = <b>64</b>