Answer:
(a) x=−20 1/2
Step-by-step explanation:
Multiply by the product of the denominators and solve the resulting linear equation in the usual way.
![\dfrac{2}{7}=\dfrac{-5}{x+3}\\\\2(x+3)=-5(7)\qquad\text{multiply by $7(x+3)$}\\\\2x+6=-35\qquad\text{simplify}\\\\2x=-41\qquad\text{subtract 6}\\\\\boxed{x=-20\dfrac{1}{2}}\qquad\text{divide by 2}](https://tex.z-dn.net/?f=%5Cdfrac%7B2%7D%7B7%7D%3D%5Cdfrac%7B-5%7D%7Bx%2B3%7D%5C%5C%5C%5C2%28x%2B3%29%3D-5%287%29%5Cqquad%5Ctext%7Bmultiply%20by%20%247%28x%2B3%29%24%7D%5C%5C%5C%5C2x%2B6%3D-35%5Cqquad%5Ctext%7Bsimplify%7D%5C%5C%5C%5C2x%3D-41%5Cqquad%5Ctext%7Bsubtract%206%7D%5C%5C%5C%5C%5Cboxed%7Bx%3D-20%5Cdfrac%7B1%7D%7B2%7D%7D%5Cqquad%5Ctext%7Bdivide%20by%202%7D)
Given 3a/(a+1)^2
To make the denominator a cube, you would have to multiply by 1 or (a+1)/(a+1)
yielding 3a(a+1)/(a+1)^3
(3a^2 + 3a) is the equivalent numerator
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If Ali has x cards, then Belinda has 2x cards.
If Ali has x cards, then Charlie has x+5 cards.
2x (Belinda) + x+5 (Charlie) + x (Ali) = 33 (total)
2x + x+5 + x = 33
Now simplify the equation... x+x+5 can be simplified as 2x+5.
2x+5 plus 2x can become 4x+5.
So their total number is 4x+5.
So 4x+5=33.
You want to isolate the variables and numbers.
To remove the 5 from the left side, subtract 5 from both sides.
4x+5-5=4x - 33-5=28
So the equation now is 4x=28
To remove the 4, divide each side by 4.
4x÷4=x - 28÷4=7
So x equals 7, Ali has 7 cards.
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Answer:
He mows 80 yards.
Make meh happy pls ;)
Step-by-step explanation: