source : jiskha.com

## x=7 I need help making a two-column

Questions

Write a two-column proof.

Given: 7y=8x-14; y=6

Prove: x=7

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

3. ????|????

4. ????|????

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

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Unknown

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

7y=8x-14; y=6

then:

42 = 8x – 14

56 = 8x

x = 56/8 = 7

There! I have proven it.

All that other stuff is just “word salad” to me.

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Reiny

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.

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Steve

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

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OCA

Oct 7, 2016

ws

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aqw

Oct 3, 2018

.

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That dude

Oct 20, 2020

my toe is itchy

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bruh

Oct 21, 2020

cool story bro ima dip

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ok

Nov 2, 2020

Id rather be sleeping rn but instead i have 58 overdue assignments to do kill me

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Welp

Jan 11, 2021

Same welp same and I only have 7 days to complete them UGHHH

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Coco

Feb 27, 2021

dude i hate geometry algebra is way easier to cheat

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Yurr

Mar 19, 2021

@yurr FR I hate it so much

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Swayyy

Mar 29, 2021

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