Answer: p x (3q - 5 - 2pq)
Original equation x = yz / a solve for a
xa = yz
a = yz / x
3(21+15) is 3*21 and 3*15 which equal 63+45 which is 108 dollars
You can solve <span>9/x-4/y=8 for x or for y but NOT at the same time.
Solving for x: </span><span>9/x-4/y=8 Mult all 3 terms by xy to eliminate the fractions.
9(xy)/x - 4xy/y = 8xy => 9y - 4x = 8xy, or 9y = 4x + 8xy = 4x(1+2y)
then 9y = x [ 4(1+2y) ]
9y
therefore x = ------------
4(1+2y)
Solve for y using a similar approach.
</span>
Answer:
7 1/2 x - 3/4 y
Step-by-step explanation:
