Select all the correct answers. 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

answer: 80,000

step-by-step explanation:

the population doubles every day.

10,000*2=20,000 day 4

20,000*2=40,000 day 5

40,000*2=80,000 day 6

b

step-by-step explanation:

i dont know

is there more to this question?

1. for division, flip the second fraction.

2. factor the numerator and denominator completely.

3. divide out common factors.

4. multiply the simplified fractions.