Given dat Y=6, Z=-7
my mum was (X+Y+Z+3)yrs wen she gave birth to me.
Now she's (80-X+Y)yrs.
Since (X+Y+Z+3) = (X+6-7+3) = X+2,
your mum was X+2 years old when she gave birth to you.
Since (80-X+Y) = (80-X+6) = 86-X,
she's 86-X years old now.
Your present age is how much older she is now than then:
So your present age = (86-X)-(X+2) = 86-X-X-2 = 84-2X
& my age is given.
No it isn't, you only said it is given, but you didn't give
it, so it isn't given. If it were given, we could set 84-2X
equal to it, and then we could find X and then substitute
the value we got for X in 86-X to find out how old your mother
was when you were born.
Here are the feasible answers:
If your present age is 2, then she was 43 when you were born. She is 45 now.
If your present age is 4, then she was 42 when you were born. She is 46 now.
If your present age is 6, then she was 41 when you were born. She is 47 now.
If your present age is 8, then she was 40 when you were born. She is 48 now.
If your present age is 10, then she was 39 when you were born. She is 49 now.
If your present age is 12, then she was 38 when you were born. She is 50 now.
If your present age is 14, then she was 37 when you were born. She is 51 now.
If your present age is 16, then she was 36 when you were born. She is 52 now.
If your present age is 18, then she was 35 when you were born. She is 53 now.
If your present age is 20, then she was 34 when you were born. She is 54 now.
If your present age is 22, then she was 33 when you were born. She is 55 now.
If your present age is 24, then she was 32 when you were born. She is 56 now.
If your present age is 26, then she was 31 when you were born. She is 57 now.
If your present age is 28, then she was 30 when you were born. She is 58 now.
If your present age is 30, then she was 29 when you were born. She is 59 now.
If your present age is 32, then she was 28 when you were born. She is 60 now.
If your present age is 34, then she was 27 when you were born. She is 61 now.
If your present age is 36, then she was 26 when you were born. She is 62 now.
If your present age is 38, then she was 25 when you were born. She is 63 now.
If your present age is 40, then she was 24 when you were born. She is 64 now.
If your present age is 42, then she was 23 when you were born. She is 65 now.
If your present age is 44, then she was 22 when you were born. She is 66 now.
If your present age is 46, then she was 21 when you were born. She is 67 now.
If your present age is 48, then she was 20 when you were born. She is 68 now.
If your present age is 50, then she was 19 when you were born. She is 69 now.
If your present age is 52, then she was 18 when you were born. She is 70 now.
Edwin