Question

Fifteen less than a number is equivalent till one more than three times the number The number is.

Answer 1

Answer: Let’s write this problem as equation:

15 - x = 1 + 3x

1. Change to right side:
X - 15 = 3x + 1

2. Make „x” to the left side and numbers to right (without forgetting to change the sign):
X - 3x = 1 + 15
-2x = 14 |:(-2)
x = -7.

Proof:
-7 - 15 = 3 * (-7) - 1
-22 = -21 - 1
-22 = -22

Answer 2

x = -8

Explanation:

x - 15 = 3x + 1

-15 - 1 = 3x - x

-16 = 2x

- 16/2 = x

-18 = x