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

answer: i don't understand it

step-by-step explanation: sorry

well we know there are 4 clubs in 52 cards so it’s replaced so it should be 3/51

step-by-step explanation:

d. 24+-0.114

step-by-step explanation:

the question requires us to calculate the approximate 95% confidence interval for the mean number of ounces of ketchup per bottle in the sample given the following statistics;

sample mean = 24

standard deviation, σ = 0.4

sample size , n = 49

the confidence interval for a population mean is calculated using the formula;

sample mean ± z-score*(σ/sqrt(n))

the z-score associated with a 95% confidence interval, from the standard normal tables, is;

1.96

substituting these values into the formula;

24 ± 1.96*(0.4/7)

= 24 ± 0.112

from the alternatives given, choice d is closest to the above expression;