nine less the product of seven and a number is equal to three times the sum of the number and five. find the #

Answer 1

7x - 9 = 3(x + 5)
7x - 9 = 3x + 15
4x = 24
x = 6

Answer 2

7x - 9 = 3 ( x + 5 )
7x - 9 = 3x + 15
7x - 3x = 15 + 9
4x = 24
Therefore x =6

Answer 3

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Answer 4

7x-9 = 3(x+5)

you solve and get x = 6

check:
7(6)-9 = 3(6+5)
33 = 33

Answer 5

9 - 7x = 3(x + 5)
9 - 7x = 3x + 15 (simplify)
9 = 10x + 15 (add 7x to both sides)
-6 = 10x (subtract 15 from both sides)
-0.6 = x (divide both sides by 10)

Check: 9 - 7(-0.6) = 9 + 4.2 = 13.2
3(-0.6 + 5) = -1.8 + 15 = 13.2

Answer 6

7x-9=3(x+5)
4x=24=>x=6

Answer 7

9-7x=3(x+5)
9-7x=3x+15
-10x=6
x=-0.6

Answer 8

9 - 7n = 3(n + 5)
9 - 7n = 3n + 15
10n = - 6
n = - 0.6