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Sergio039 [100]
3 years ago
12

Solve the equation 4(0.2x – 5) = 12.

Mathematics
1 answer:
Alenkasestr [34]3 years ago
5 0

Simplifying

4(0.2x + -5) = 12

Reorder the terms:

4(-5 + 0.2x) = 12

(-5 * 4 + 0.2x * 4) = 12

(-20 + 0.8x) = 12

Solving

-20 + 0.8x = 12

Solving for variable 'x'.

Move all terms containing x to the left, all other terms to the right.

Add '20' to each side of the equation.

-20 + 20 + 0.8x = 12 + 20

Combine like terms: -20 + 20 = 0

0 + 0.8x = 12 + 20

0.8x = 12 + 20

Combine like terms: 12 + 20 = 32

0.8x = 32

Divide each side by '0.8'.

x = 40

Simplifying

x = 40

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now we'll need to divide both sides by 2
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Finding the length will be the easy part, as we know that it is just 100 more than the width
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If you want an easier way of finding the length, just subtract the width from the perimeter.
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