Mister Exam
Other calculators
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How to use it?
- Equation:
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Equation 2*x^2-x-1=x^2-5*x-(-1-x^2)
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Equation 9*(x-5)=-x
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Equation cos(x)=3
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Equation 2-3*(2*x+2)=5-4*x
- Express {x} in terms of y where:
- -11*x-14*y=-3
- 10*x-2*y=0
- 10*x+1*y=10
- 2*x+2*y=-6
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Identical expressions
- ((x+ nine)/ three)-(x/ seven)= two
- ((x plus 9) divide by 3) minus (x divide by 7) equally 2
- ((x plus nine) divide by three) minus (x divide by seven) equally two
- x+9/3-x/7=2
- ((x+9) divide by 3)-(x divide by 7)=2
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Similar expressions
- (x+9)/3-x/7=2
- ((x-9)/3)-(x/7)=2
- ((x+9)/3)+(x/7)=2
((x+9)/3)-(x/7)=2 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:
$$\frac{4 x}{21} = -1$$
Divide both parts of the equation by 4/21
We get the answer: x = -21/4
((x+9)/3)-(x/7) = 2
Expand brackets in the left part
x/3+9/3)-x/7 = 2
Looking for similar summands in the left part:
3 + 4*x/21 = 2
Move free summands (without x)
from left part to right part, we given:
$$\frac{4 x}{21} = -1$$
Divide both parts of the equation by 4/21
x = -1 / (4/21)
We get the answer: x = -21/4
Sum and product of roots
[src]
sum
-21/4
$$- \frac{21}{4}$$
=
-21/4
$$- \frac{21}{4}$$
product
-21/4
$$- \frac{21}{4}$$
=
-21/4
$$- \frac{21}{4}$$
-21/4