(4x-7)-(9x-3)=21 equation

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4*x - 7 + -9*x + 3 = 21

$$\left(3 - 9 x\right) + \left(4 x - 7\right) = 21$$

Simplify

Detail solution

Given the linear equation:

(4*x-7)-(9*x-3) = 21

Expand brackets in the left part

4*x-7-9*x+3 = 21

Looking for similar summands in the left part:

-4 - 5*x = 21

Move free summands (without x)
from left part to right part, we given:
$$- 5 x = 25$$
Divide both parts of the equation by -5

x = 25 / (-5)

We get the answer: x = -5

The graph

Plot the graph f1(x)

Plot the graph f2(x)

Rapid solution [src]

x1 = -5

$$x_{1} = -5$$

x1 = -5

Sum and product of roots [src]

sum

-5

$$-5$$

-5

$$-5$$

product

-5

$$-5$$

-5

$$-5$$

-5

Numerical answer [src]

x1 = -5.0

x1 = -5.0

The graph