-3x+7x-11x=18.9 equation

The teacher will be very surprised to see your correct solution 😉

You have entered [src]

                    189
-3*x + 7*x - 11*x = ---
                     10

$$- 11 x + \left(- 3 x + 7 x\right) = \frac{189}{10}$$

Simplify

Detail solution

Given the linear equation:

-3*x+7*x-11*x = (189/10)

Expand brackets in the right part

-3*x+7*x-11*x = 189/10

Looking for similar summands in the left part:

-7*x = 189/10

Divide both parts of the equation by -7

x = 189/10 / (-7)

We get the answer: x = -27/10

The graph

Plot the graph f1(x)

Plot the graph f2(x)

Sum and product of roots [src]

sum

-27 
----
 10

$$- \frac{27}{10}$$

-27 
----
 10

$$- \frac{27}{10}$$

product

-27 
----
 10

$$- \frac{27}{10}$$

-27 
----
 10

$$- \frac{27}{10}$$

-27/10

Rapid solution [src]

     -27 
x1 = ----
      10

$$x_{1} = - \frac{27}{10}$$

x1 = -27/10

Numerical answer [src]

x1 = -2.7

x1 = -2.7