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40-12x-7=21 equation

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Numerical solution:

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The solution

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40 - 12*x - 7 = 21
$$\left(40 - 12 x\right) - 7 = 21$$
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
The graph
Sum and product of roots [src]
sum
1
$$1$$
=
1
$$1$$
product
1
$$1$$
=
1
$$1$$
1
Rapid solution [src]
x1 = 1
$$x_{1} = 1$$
x1 = 1
Numerical answer [src]
x1 = 1.0
x1 = 1.0