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lana66690 [7]
3 years ago
10

This is a solving system of equations with the elimanaton method pls help

Mathematics
1 answer:
a_sh-v [17]3 years ago
8 0

Answer:

<h2>x = 9 and y = 5</h2>

Step-by-step explanation:

\underline{+\left\{\begin{array}{ccc}-4x+9y=9\\3x-9y=-18\end{array}\right}\qquad\text{add both sides of the equations}\\.\qquad-x=-9\qquad\text{chnge the signs}\\.\qquad\boxed{x=9}\\\\\text{Put the value of x to the first equation.}\\\\-4(9)+9y=9\\-36+9y=9\qquad\text{add 36 to both sides}\\9y=45\qquad\text{divide both sides by 9}\\\boxed{y=5}

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melisa1 [442]
The correct answer is x=12
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3 years ago
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3. The cost(P) in Ghana Ghana Cedis, of producing n items is given by the formula, P=3/4n + 1800. a. Find the cost of producing
ArbitrLikvidat [17]

Answer:

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2 years ago
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Afina-wow [57]
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