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3 years ago

Can you solve for x for this shape?

Mathematics

2 answers:

mr Goodwill [35]3 years ago

8 0

An exterior angle of a triangle is equal to the sum of the two angles opposite to it. So we have:

$\sf 6x+1+20=9x-6$

Now just solve for 'x'. First, simplify:

$\sf 6x+21=9x-6$

Add 6 to both sides:

$\sf 6x+27=9x$

Subtract 6x to both sides:

$\sf 27=3x$

Divide 3 to both sides:

$\boxed{\sf x=9}$

Ilia_Sergeevich [38]3 years ago

5 0

Hi my friend
6x + 1 + 20 = 9x - 6 (exterior angle of triangle)
3x = 27
x = 9
hope it helps☺

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