20 POINT QUESTION MAKE SURE YOU ACTUALLY SELECT ALL Which equations have only one solution?

1/3x + 3 = 26 + 6/18x - 23

x + 3 + 3x = -3 + 4x + 6

2(1/5 + 1/4x) - 2x = x - 1

4.3x + 2.5 - 2.2x + 2.2 - 2.1x = 0

2(4x + 3) + 2x = 5(2x + 3)

2/5x + 10 + 3/5x = 2x + 5

Asmall foreign car gete 42 miles per gallon and user 35 gallons on a trip.gasoline costs $1.05 per gallon.what was the cost of gasoline per mile driver?

12. the amount of money in a bank account decreased by 21.5% over the last year. if the amount of money at the beginning of the year is represented by ‘n', write 3 equivalent expressions to represent the amount of money in the bank account after the decrease?

Which of the following is a function? a.) {(-2, -4/5), (-1,-,,-1)} b.) {(-2,,1/,3/,1)} c.) {(-22)} d.) {(-21)}