Mister Exam
Other calculators
-
How to use it?
- Equation:
-
Equation x^4-4x^2+4=0
-
Equation x^2+11*x+30=0
-
Equation 6x^2+x-7=0
-
Equation 68+x*6=164
- Express {x} in terms of y where:
- 11*x-3*y=13
- -11*x-3*y=-19
- 4*x-20*y=12
- -2*x+9*y=-11
-
Identical expressions
- 7x-(twenty-one -3x)= four
- 7x minus (21 minus 3x) equally 4
- 7x minus (twenty minus one minus 3x) equally four
- 7x-21-3x=4
-
Similar expressions
- 7x+(21-3x)=4
- 7x-(21+3x)=4
7x-(21-3x)=4 equation
The teacher will be very surprised to see your correct solution 😉
The solution
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:
$$10 x = 25$$
Divide both parts of the equation by 10
We get the answer: x = 5/2
7*x-(21-3*x) = 4
Expand brackets in the left part
7*x-21+3*x = 4
Looking for similar summands in the left part:
-21 + 10*x = 4
Move free summands (without x)
from left part to right part, we given:
$$10 x = 25$$
Divide both parts of the equation by 10
x = 25 / (10)
We get the answer: x = 5/2
Sum and product of roots
[src]
sum
5/2
$$\frac{5}{2}$$
=
5/2
$$\frac{5}{2}$$
product
5/2
$$\frac{5}{2}$$
=
5/2
$$\frac{5}{2}$$
5/2