40-12x-7=21 equation
The teacher will be very surprised to see your correct solution 😉
The solution
Detail solution
Given the linear equation:
40-12*x-7 = 21
Looking for similar summands in the left part:
33 - 12*x = 21
Move free summands (without x)
from left part to right part, we given:
$$- 12 x = -12$$
Divide both parts of the equation by -12
x = -12 / (-12)
We get the answer: x = 1
Sum and product of roots
[src]
$$1$$
$$1$$
$$1$$
$$1$$