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3 years ago

What is the first step needed to solve (3/4)x-3=-18

Mathematics

2 answers:

Alenkasestr [34]3 years ago

8 0

(3/4)x-3=-18

add 3 to each side

3/4 x -3+3 = -18 +3

3/4 x = -15

multiply by 4/3

4/3* 3/4 x = -15*4/3

x = -20

STatiana [176]3 years ago

7 0

(3/4)x-3=-18

add 3 to each side

3/4 x -3+3 = -18 +3

3/4 x = -15

multiply by 4/3

4/3* 3/4 x = -15*4/3

x = -20

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Solving for an Unknown Using the Distributive Property

ArbitrLikvidat [17]

Complete Question:

The equation a= 180(n-2)/n represents the angle measures, a, in a regular n-sided polygon. When the equation is solved for n, n is equal to a fraction with a denominator of a – 180. What is the numerator of the fraction?

Answer:

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Solution:

Given that,

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Rearrange the equation

$a \times n = 180(n - 2)\\\\a \times n = 180n - 360\\\\an - 180 n = -360\\\\Take\ n\ as\ common\ factor\\\\n(a-180) = -360\\\\n = \frac{-360}{a - 180}$