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Serjik [45]
3 years ago
7

What is the value of x if 3x - 6 = 21 ?

Mathematics
2 answers:
bearhunter [10]3 years ago
5 0

Hello There!

X=9

If we substitute X in this equation, it would say 3*9 which equals 27 subtract 6 and you get 21 which is true.

Anestetic [448]3 years ago
3 0

Answer:

<h2>x = 9</h2>

Step-by-step explanation:

3x-6=21\qquad\text{add 6 to both sides}\\\\3x-6+6=21+6\\\\3x=27\qquad\text{divide both sides by 3}\\\\\dfrac{3x}{3}=\dfrac{27}{3}\\\\x=9

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Answer:

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Step-by-step explanation:

27. The two angles whose measures are set equal by the equation are on opposite sides of the transversal, so are "opposite." They are "outside" the space between the parallel lines, so are "exterior." These descriptors identify the angles as "opposite exterior" angles. The theorem/postulate that lets you set their measures equal is ... [the one written above].

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<span>
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