4 months ago

Solve 14x-7y= 21 for y A. y = 2x - 21 B. y=-14x + 21 C. y = 14x +3 D. y=2x-3

Mathematics

1 answer:

jonny [76]4 months ago

3 0

Answer:D

Step-by-step explanation::

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Which equation has no solution?

prohojiy [21]

Answer:

Step-by-step explanation:

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10 = 0

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2 years ago

What is the solution of StartFraction negative 8 Over 2 y minus 8 EndFraction = StartFraction 5 Over y + 4 EndFraction minus Sta

antiseptic1488 [7]

Answer:

y = 6

Step-by-step explanation:

$\dfrac{-8}{2y-8}=\dfrac{5}{y+4}-\dfrac{7y+8}{y^2-16} \quad\text{given}\\\\\dfrac{-4(y+4)}{y^2-16}=\dfrac{5(y-4)}{y^2-16}-\dfrac{7y+8}{y^2-16} \quad\text{use common denominator}\\\\-4y-16=5y-20-7y-8 \quad\text{multiply by that denominator}\\\\12=2y \quad\text{add 4y+28}\\\\6=y \quad\text{divide by 2}$