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2a plus 21 equals 8a-9

Anonymous

∙ 16y ago

Updated: 12/21/2022

2a + 21 = 8a - 9

Add 9 to each side:

2a + 30 = 8a

Subtract 2a from each side:

30 = 6a

Divide each side by 6:

5 = a

Wiki User

∙ 16y ago

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a + a + a - 2a = 3a - 2a = a

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2a+5a+9a = 16a

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A=2

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a = 1

How do you solve -2a plus 5 plus 3a equals 15-21?

depends what 'a' =

A plus a plus a-2a equals?

a + a + a - 2a = 3a - 2a = a

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2a+5a+9a = 16a

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a= (+a) or a= (-) b= 2a b= 2a c= (-a) c= (+a)

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A equals 20.

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2a + 3a + 4 = 5a + 4

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A=2

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a = 1

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2a+54=38 2a=38-54 2a=-16 a=-16/2 a=-8

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