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-2(1/3x+7)=-21

-2(1/3x+7)=-21 equation

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Numerical solution:

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The solution

You have entered [src] 
   /x    \      
-2*|- + 7| = -21
   \3    /
$$- 2 \left(\frac{x}{3} + 7\right) = -21$$
Simplify
Detail solution
Given the linear equation:
-2*(1/3*x+7) = -21

Expand brackets in the left part
-2*1/3*x-2*7 = -21

Move free summands (without x)
from left part to right part, we given:
$$- \frac{2 x}{3} = -7$$
Divide both parts of the equation by -2/3
x = -7 / (-2/3)

We get the answer: x = 21/2
The graph
Plot the graph f1(x)
Plot the graph f2(x)
Rapid solution [src] 
x1 = 21/2
$$x_{1} = \frac{21}{2}$$ 
x1 = 21/2
Sum and product of roots [src] 
sum
21/2
$$\frac{21}{2}$$ 
=
21/2
$$\frac{21}{2}$$ 
product
21/2
$$\frac{21}{2}$$ 
=
21/2
$$\frac{21}{2}$$ 
21/2
Numerical answer [src] 
x1 = 10.5
x1 = 10.5
The graph
-2(1/3x+7)=-21 equation
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