Find the value of y when x=-3 in the equation y=6x+8

Karen is financing $291,875 to purchase a house. she obtained a 15/5 balloon mortgage at 5.35%. what will her balloon payment be? a. $220,089.34 b. $219,112.46 c. $246,181.39 d. $230,834.98

Which of these is and example of a literal equation? a) 6+30=6^2 b)3x-4y c)12=9+3x d)ax-by=k

What is the answer to this question? i'm a bit stumped. also how do i do it? 5(x - 4) = 2(x + 5)