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12-4(x-3)=39+9x equation

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12 - 4*(x - 3) = 39 + 9*x

12 - 4 \left(x - 3\right) = 9 x + 39

Simplify

Detail solution

Given the linear equation:

12-4*(x-3) = 39+9*x

Expand brackets in the left part

12-4*x+4*3 = 39+9*x

Looking for similar summands in the left part:

24 - 4*x = 39+9*x

Move free summands (without x)
from left part to right part, we given:

- 4 x = 9 x + 15

Move the summands with the unknown x
from the right part to the left part:

\left(-13\right) x = 15

Divide both parts of the equation by -13

x = 15 / (-13)

We get the answer: x = -15/13

The graph

Plot the graph f1(x)

Plot the graph f2(x)

Sum and product of roots [src]

sum

-15 
----
 13

- \frac{15}{13}

-15 
----
 13

- \frac{15}{13}

product

-15 
----
 13

- \frac{15}{13}

-15 
----
 13

- \frac{15}{13}

-15/13

Rapid solution [src]

     -15 
x1 = ----
      13

x_{1} = - \frac{15}{13}

x1 = -15/13

Numerical answer [src]

x1 = -1.15384615384615

x1 = -1.15384615384615