2 years ago

If 15% of 4x is 20 less than x, what is the value of x?

Mathematics

1 answer:

Bess [88]2 years ago

4 0

The sentence "15% of 4x is 20 less than x"

translates to 0.15 • (4x) = x – 20

Solving that…

0.15(4x) = x - 20 multiplipy 0.15•4

0.6x = x - 20 subtract x from both sides

-0.4x = - 20 divide both sides by -0.4

x = 50

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Write an equation of the line that passes through (18, 2) and is parallel to the line 3y−x=−12

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First isolate the "y" in the equation.

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2y - x + x = -12 + x

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Your slope is $\frac{1}{2}$ .

For the equation of the line to be parallel to the given equation, the slopes have to be the same. So the parallel line's slope is also $\frac{1}{2}$

y = mx + b

$y = \frac{1}{2}x + b$

To find "b", you plug in the point (18,2) into the equation

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Your equation is:

$y =\frac{1}{2}x - 7$

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