12x - 5 = 8x - x + 50 Help please show work and check the solution

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asked Oct 13, 2020 88.1k views

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12x - 5 = 8x - x + 50
Help please show work and check the solution

Mathematics
middle-school

Arlene asked

by Arlene

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1 Answer

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Answer:

x = 11

Explanation:

$12x - 5 = 8x - x + 50 \\ 12x - 5 = 7x + 50 \\ 12x - 5 - 7x = 7x + 50 - 7x \\ 12x - 7x - 5 = 50 \\ 5x - 5 = 50 \\ 5x - 5 + 5 = 50 + 5 \\ 5x = 55 \\ x = 11$

and check:

$12(11) - 5 = 8(11) - (11) + 50 \\ 132 - 5 = 77 + 50 \\ 127 = 127$

Spozun answered Oct 20, 2020

by Spozun

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