Mister Exam
Other calculators
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How to use it?
- Equation:
-
Equation x^4=81
-
Equation 12/(x-15)=15/(x-12)
-
Equation ||x|-4|=5
-
Equation 3^x=1
- Express {x} in terms of y where:
- -14*x+19*y=-3
- -12*x-13*y=-2
- -3*x-1*y=-9
- -4*x-12*y=13
- Graphing y =:
- x-4
- Integral of d{x}:
-
x-4
- Derivative of:
-
x-4
-
Identical expressions
- -8x+ four *(seven -9x)=x- four
- minus 8x plus 4 multiply by (7 minus 9x) equally x minus 4
- minus 8x plus four multiply by (seven minus 9x) equally x minus four
- -8x+4(7-9x)=x-4
- -8x+47-9x=x-4
-
Similar expressions
- -8x+4*(7+9x)=x-4
- -8x+4*(7-9x)=x+4
- 8x+4*(7-9x)=x-4
- -8x-4*(7-9x)=x-4
-8x+4*(7-9x)=x-4 equation
The teacher will be very surprised to see your correct solution 😉
The solution
You have entered
[src]
-8*x + 4*(7 - 9*x) = x - 4
$$- 8 x + 4 \cdot \left(- 9 x + 7\right) = x - 4$$
Detail solution
Given the linear equation:
Expand brackets in the left part
Looking for similar summands in the left part:
Move free summands (without x)
from left part to right part, we given:
$$- 44 x = x - 32$$
Move the summands with the unknown x
from the right part to the left part:
$$- 45 x = -32$$
Divide both parts of the equation by -45
We get the answer: x = 32/45
-8*x+4*(7-9*x) = x-4
Expand brackets in the left part
-8*x+4*7-4*9*x = x-4
Looking for similar summands in the left part:
28 - 44*x = x-4
Move free summands (without x)
from left part to right part, we given:
$$- 44 x = x - 32$$
Move the summands with the unknown x
from the right part to the left part:
$$- 45 x = -32$$
Divide both parts of the equation by -45
x = -32 / (-45)
We get the answer: x = 32/45
Sum and product of roots
[src]
sum
32 -- 45
$$\left(\frac{32}{45}\right)$$
=
32 -- 45
$$\frac{32}{45}$$
product
32 -- 45
$$\left(\frac{32}{45}\right)$$
=
32 -- 45
$$\frac{32}{45}$$
The graph