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Subjects>Math>Math & Arithmetic

21 equals 5x plus 3x plus 5?

Updated: 9/18/2023

Wiki User

∙ 14y ago

Best Answer

Subtract 5 from each side: 16 = 5x + 3x ie 16 = 8x

Divide each side by 8: 2 = x

21 = 5x + 3x + 5

21 - 5 = 8x

16 = 8x

16/2 = x

2 = x

x = 2

Check:

21 = 5(2) + 3(2) + 5

21 = 10 + 6 + 5

21 = 21

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∙ 14y ago

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