Which equation has no solution?

a. 2.3y + 2 +3.1y = 4.3y + 1.6 + 1.1y + 0.4
b. 32x + 25 - 21x = 10x
c. 5/8x + 2.5 = 3/8x + 1.5 + 1/4x
d. 1/3 + 1/7y = 3/7y

someone me i have no idea

Is the product of two rational numbers irrational or rational? first, make a hypothesis by multiplying two rational numbers. then, use variables such as x=a/b and y=c/d and the closure property of integers to prove your hypothesis.

Kayaks rent for $35 per day. which expression can you use to find the cost in dollars of renting 3 kayaks for a day?

Which number line correctly shows 0.8 + 0.3?