Determine the error in Marty's work to solve the following equation. Please help me find what is wrong with the equation fast

Original equation: 3(-2x - 6) = 4 + 2 (7x - 3)
Line 1: -62 - 18 = 4 + 142 - 3
Line 2: -6x - 18 = 1 + 143
Line 3: -18 = 1 + 20
Line 4: -19 = 20.3
Line 5: -19/20=x

The vertices of a rectangle are given in the columns of the matrix . if is found to perform a transformation, what are the coordinates of the transformed rectangle? (0, 0), (0, –3), (–3, –3), (–3, 0) (0, 0), (0, 3), (3, 3), (3, 0) (0, 0), (0, 3), (–3, –3), (–3, 0) (0, 0), (0, 3), (–3, 3), (–3, 0)

Diana is painting statues she has 7/8 of a liter of paint each statue requires 1/20 of a liter of paint how many statues can she paint?

Imogene invested $8,000 in a bank account that pays 8 percent simple interest at the end of each year. her friend invested the same amount in stocks where the growth of the investment is represented as 2,000 times the square root of 2 less than the time lapsed in years. if y1 and y2 represent the amount earned in dollars and t is the time lapsed in years, which system of equations correctly represents the situation?