Can someone please help me explain whether this solution is correct or not?

(x-3)0.20+18.40

(0.2*x)-(0.2*3)=18.40

0.2x-0.6=18.40

+.06=+0.6

0.2x+19

/0.2 /0.2

X=19/2 or 9.50

Amajor grocery store chain is trying to cut down on waste. currently, they get peaches from two different distributors, whole fruits and green grocer. out of a two large shipments, the manager randomly selects items from both suppliers and counts the number of items that are not sell-able due to bruising, disease or other problems. she then makes a confidence interval. is there a significant difference in the quality of the peaches between the two distributors? 95% ci for pw-pg: (0.064, 0.156)

Opposite angles in a parrellelogram are

What is the absolute value of -100000000000000?