Two more than a certain number is 15 less than the product of 7/8 and the number need the equation and solution

2 + x = 7/8x - 15

Subtract 2 from both sides and remember that 15 is negative. And then do 8/7 times both x. Subtract the x on right side to 8/7x. Answer is x=-17.

it would take 7/10 of an hour too fill the pool.

step-by-step explanation:

hello from mrbilldoesmath!

answer:

(7 x + 6 y) (49 x^2 - 42 x y + 36 y^2)

discussion:

the trick is to recognize that 343 = 7^3 and 216 = 6^3 and, in general,

a^3 + b^3 =   (a + b) (a^2 - a b + b^2).

in our case

343x^3+216y^3   =   (7x)^3 + (6y)^3

so take a = 7x and b = 6y in the above equation to get the answer.

you,

mrb