2 years ago

When 2.5 times a number n is subtracted from 6.1, the result is −11.4.

1 answer:

5 0

" 2.5 times a number 'n' " = 2.5n

" 2.5n is subtracted from 6.1 " . . . . that's 6.1 - 2.5n

" the result is -11.4 " . . . . . so  6.1 - 2.5n = -11.4

Add 11.4 to each side : 17.5 - 2.5n = 0

Add 2.5n to each side: 17.5 = 2.5n

Divide each side by 2.5 : 7 = n

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