3 years ago

10,000-80 what does it equal?

Mathematics

1 answer:

adelina 88 [10]3 years ago

4 0

10000
- 80
________
9920

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4x+11y=7 4x+3y=-1 what are the steps

andreev551 [17]

Answer:

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Step-by-step explanation:

Given that:

$\begin{bmatrix}4x+11y=7\\ 4x+3y=-1\end{bmatrix}$

Isolate x for 4x + 11y = 7 which ⇒ $x=\frac{7-11y}{4}$

Substitute $x=\frac{7-11y}{4}$ into the equation: which is:

$\begin{bmatrix}4\cdot \frac{7-11y}{4}+3y=-1\end{bmatrix}$

Drop Down to:

$\begin{bmatrix}7-8y=-1\end{bmatrix}$

Isolate y for 7-8y = -1: y = 1

Thus, $x=\frac{7-11y}{4}$

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Hence,

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Solution ⇒ x = -1 and y = 1

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