source : jiskha.com
x=7 I need help making a two-column
Write a two-column proof.
Given: 7y=8x-14; y=6
I need help making a two-column proof with the statements and the reasons, please! Thank you! ( This is what I have so far)
Statements | Reasons
1. 7y=8x-14;y=6 | Given
2. 7(6)=8x-14 | Substitution
5. x=7| ????
(I just stopped at 5 for right, that’s not the exact steps I think the two-column proof actually has)
Thank you again for whoever helps me! Be Blessed
Sep 7, 2016
To me a two column proof is usually associated with Euclidean Geometry.
To use it here in this rather simplistic problem is like using a sledge hammer to drive in a finishing nail …
here is what I would do
42 = 8x – 14
56 = 8x
x = 56/8 = 7
There! I have proven it.
All that other stuff is just “word salad” to me.
Sep 7, 2016
It has to do with so-called addition property of equality and division property of equality.
Basically, if two things are equal,
adding or dividing both things by the same amount does not affect their equality.
Sep 7, 2016
Given – 7y=8x-14 : y=6
Substitution Property – 7(6)=8x-14
Distributive Property – 8x-14=42
Addition Property – 8x=56
Division Property – x=7
Oct 7, 2016
Oct 3, 2018
Oct 20, 2020
my toe is itchy
Oct 21, 2020
cool story bro ima dip
Nov 2, 2020
Id rather be sleeping rn but instead i have 58 overdue assignments to do kill me
Jan 11, 2021
Same welp same and I only have 7 days to complete them UGHHH
Feb 27, 2021
dude i hate geometry algebra is way easier to cheat
Mar 19, 2021
@yurr FR I hate it so much
Mar 29, 2021
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