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3 years ago

21 = 4x - 9 - x what is x?

Mathematics

2 answers:

alexgriva [62]3 years ago

6 0

Answer:

x = 10

Step-by-step explanation:

Given

21 = 4x - 9 - x, that is

21 = 3x - 9 ( add 9 to both sides )

30 = 3x ( divide both sides by 3 )

10 = x

IrinaVladis [17]3 years ago

4 0

Answer:

x = 10

Step-by-step explanation:

21 = 4x - 9 - x

21 = 3x - 9

30 = 3x

10 = x

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