Question

write a two column proof. given 7y=8x -14, y=6 prove x=7

Answer 1

this one is trivial, but did you draw the columns already? your first rows can be

statement: 7y = 8x - 14 reason: given
statement: y = 6 reason: given

Answer 2

then substitute y = 6, and solve as you normally would using algebra to prove x = 7

Answer 3

so how do I do the algebra formula for x=7?

Answer 4

i can write out the steps

let me know if a step requires explanation