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3 years ago

Which is the value of x

Mathematics

2 answers:

svetoff [14.1K]3 years ago

6 0

All of those formulas must add up to 180 degrees, because a straight line is 180 degrees. We could add them all up (x+10+2x+10+4x+3x-5). Add all the x up...(10x) and the numbers...(16). Now we have an equation 10x+16=180. Isolate the x, and you get x=16.4

vodka [1.7K]3 years ago

5 0

16.5 is what I got for x you add them up and equal them to 180 because its a straight line

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cluponka [151]

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Solve the following system:
{2 x + 3 y = 2 | (equation 1)
{6 x + 18 y = 9 | (equation 2)

Swap equation 1 with equation 2:
{6 x + 18 y = 9 | (equation 1)
{2 x + 3 y = 2 | (equation 2)

Subtract 1/3 × (equation 1) from equation 2:
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Divide equation 1 by 3:
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Multiply equation 2 by -1:
{2 x + 6 y = 3 | (equation 1)
{0 x+3 y = 1 | (equation 2)

Divide equation 2 by 3:
{2 x + 6 y = 3 | (equation 1)
{0 x+y = 1/3 | (equation 2)

Subtract 6 × (equation 2) from equation 1:
{2 x+0 y = 1 | (equation 1)
v0 x+y = 1/3 | (equation 2)

Divide equation 1 by 2:
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Collect results:
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