the sum of a number and four is tripled, the result is six less than twice the number. Find the number.?
回答 (3)
2018-04-10 3:37 pm
Let x be the number.
2x - 3(x + 4) = 6
2x - 3x - 12 = 6
-x = 18
x = -18
The number = -18
2x - 3(x + 4) = 6
2x - 3x - 12 = 6
-x = 18
x = -18
The number = -18
2018-04-10 5:18 pm
3 [ x + 4 ] = 2x - 6
3x + 12 = 2x - 6
x = - 18______is the number
3x + 12 = 2x - 6
x = - 18______is the number
2018-04-10 3:42 pm
The number is n.
The sum of a number and four is tripled, i.e.: (n + 4) * 3
…the result is six less than twice the number, i.e.: 2n - 6
(n + 4) * 3 = 2n - 6
3n + 12 = 2n - 6
3n - 2n = - 6 - 12
n = - 18
The sum of a number and four is tripled, i.e.: (n + 4) * 3
…the result is six less than twice the number, i.e.: 2n - 6
(n + 4) * 3 = 2n - 6
3n + 12 = 2n - 6
3n - 2n = - 6 - 12
n = - 18
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