I have three questions, 1 ) Write a two-column proof.

Given: 7y = 8x – 14; y = 6

Prove: x = 7

2 & 3 are in photos, PLEASE HELP!

answer: he is 272195

step-by-step explanation: all you have to do is multiple 3535 and 77 and it equals 272195

5=812a+9+3

step 1: simplify both sides of the equation.

5=812a+9+3

5=(812a)+(9+3)(combine like terms)

5=812a+12

5=812a+12

step 2: flip the equation.

812a+12=5

step 3: subtract 12 from both sides.

812a+12−12=5−12

812a=−7

step 4: divide both sides by 812.

812a /812 = -7/812

a= -1/116

so the answer is

a=   -1/116