How do you solve and check your solution given $- 0.4 y = 2$ $-0.4y=2$ ?

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How do you solve and check your solution given $- 0.4 y = 2$ $-0.4y=2$ ?

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Answer 1 · 2017-10-02T11:03:31

$y = - 5$ $y=-5$

Explanation:

We know that $- 0.4 y = 2$ $-0.4y=2$
We multiply both sides by $10$ $10$ :

$- 0.4 y \cdot 10 = 2 \cdot 10$ $-0.4ycolor(blue)*color(blue)10=2color(blue)*color(blue)10$
Simplify:
$- 4 y = 20$ $-4y=20$
Divide both sides by $- 4$ $-4$

$\frac{- 4 y}{- 4} = \frac{20}{- 4}$ $(-4y)/(-4)=20/(-4)$
Simplify:
$y = - 5$ $y=-5$

Let's check.

$y = - 5$ $y=-5$

$- 0.4 y = 2$ $-0.4y=2$

$- 0.4 \cdot y = 2$ $-0.4*y=2$

$- 0.4 \cdot - 5 = 2$ $-0.4*-5=2$

The equation is true.
So, the answer is $y = - 5$ $y=-5$ .

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How do you solve and check your solution given $- 0.4 y = 2$ $-0.4y=2$ ?

1 Answer

Explanation:

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