Response:
12 --> 15
This reflects a 25% rise.
To calculate the increase: New Number - Original Number
15 - 12 = 3
Next, divide the increase by the original number and multiply the result by 100.
3/12 = 1/4 = 0.25 x 100 = 25
Thus, the percentage increase amounts to 25%
Starting with the equation Y - 4x = 7, we can express y as y = 4x + 7. Now, substitute this expression into the second equation 2y + 4x = 2:
2(4x + 7) + 4x = 2,
which simplifies to 8x + 14 + 4x = 2. After that, we gather like terms:
12x = 2 - 14,
yielding 12x = -12, hence x = -1. Plugging x into the equation y - 4(-1) = 7 also reveals:
y + 4 = 7,
which gives y = 3. Thus, the solution arrives at (-1, 3).
