Mister Exam
Other calculators
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How to use it?
- Equation:
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Equation 4x-x^2=x^2-x+3
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Equation x^2-21=4x
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Equation 9*x^2-1=0
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Equation 2*sin(x)*cos(x)=0
- Express {x} in terms of y where:
- -1*x+1*y=-13
- -20*x-20*y=11
- 9*x-1*y=-10
- -19*x+20*y=-11
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Identical expressions
- -(4x- seven)=-7x
- minus (4x minus 7) equally minus 7x
- minus (4x minus seven) equally minus 7x
- -4x-7=-7x
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Similar expressions
- -(4x+7)=-7x
- (4x-7)=-7x
- x=(26.88*1*sqrt(5.4343-1.65*10^-7*x^2-5.5*10^-7*7.5*x-6.3*10^-7*7.5^2-0.627*7.5-0.2*10^-5*x)-0.023*7.5)/0.0112
- -(4x-7)=+7x
- sqrt(-4x-7)=-x-1
- x^3-2*x^2-4x-7=0
- 2*x^3-7*x^2+5x-19=0
- (x-2)*(x-4)*(x-7)=x
- -4*(x-7,6)=8*(x-1,8)-3,2
- (x+5)²+(x-7)(x+7)=6x-21,5.
-(4x-7)=-7x 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
Move free summands (without x)
from left part to right part, we given:
$$- 4 x = - 7 x - 7$$
Move the summands with the unknown x
from the right part to the left part:
$$3 x = -7$$
Divide both parts of the equation by 3
We get the answer: x = -7/3
-(4*x-7) = -7*x
Expand brackets in the left part
-4*x+7 = -7*x
Move free summands (without x)
from left part to right part, we given:
$$- 4 x = - 7 x - 7$$
Move the summands with the unknown x
from the right part to the left part:
$$3 x = -7$$
Divide both parts of the equation by 3
x = -7 / (3)
We get the answer: x = -7/3
Sum and product of roots
[src]
sum
-7/3
$$- \frac{7}{3}$$
=
-7/3
$$- \frac{7}{3}$$
product
-7/3
$$- \frac{7}{3}$$
=
-7/3
$$- \frac{7}{3}$$
-7/3
The graph