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How would you solve 3x-4=9x-21
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5 votes
How would you solve 3x-4=9x-21

User Manoj Patil
by
9.3k points

2 Answers

2 votes
3x - 9x = -21 + 4
-6x = -17
x = -17/-6
x = 17/6
User Mangiucugna
by
8.1k points
1 vote
3x - 4 = 9x - 21

Subtract 9x from both sides.

3x - 9x - 4 = -21

Add 4 to both sides.

3x - 9x = -21 + 4

Simplify.

-6x = -17

Divide both sides by -6.

x = 17/6 AND 2 5/6

~Hope I helped!~
User Andy Braham
by
9.4k points
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