Hi! I am Skye, I am 9 and my Mum is getting me to do maths from higher grades as extension.
I have a question about writing an equation to find the value of a pronumeral.
Can an algebraic equation with an unknown pronumeral have two answers (and therefor two equations)?
For this question, 'I think of a number, double it, and add 5 and I get an answer of 11' I have come up with -
2 (x + 5) = 11
=2x + 10 = 11
= 1
= 2x (over) 2 = 1 (over) 2
= 0.5
And -
2x + 5 = 11
2x = 11 - 5
2x = 6
x = 6 / 2
x = 3
If you check both add back up to 11. Someone said that my first answer isn't correct as an equation. I am confused by this because they both get the answer of 11 which is what is says in the word problem.
Please help.
Thanks,
Skye
I have a question about writing an equation to find the value of a pronumeral.
Can an algebraic equation with an unknown pronumeral have two answers (and therefor two equations)?
For this question, 'I think of a number, double it, and add 5 and I get an answer of 11' I have come up with -
2 (x + 5) = 11
=2x + 10 = 11
= 1
= 2x (over) 2 = 1 (over) 2
= 0.5
And -
2x + 5 = 11
2x = 11 - 5
2x = 6
x = 6 / 2
x = 3
If you check both add back up to 11. Someone said that my first answer isn't correct as an equation. I am confused by this because they both get the answer of 11 which is what is says in the word problem.
Please help.
Thanks,
Skye