Mister Exam
Other calculators
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How to use it?
- Equation:
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Equation 14/(x-3)=-7/9
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Equation x^4+2*x^2-8=0
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Equation 9x−9(x+1)=−2x
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Equation x^4+4=0
- Express {x} in terms of y where:
- -17*x+1*y=-11
- 1*x+4*y=20
- -18*x-2*y=9
- -20*x-14*y=5
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Identical expressions
- nine x−9(x+ one)=−2x
- 9x−9(x plus 1) equally −2x
- nine x−9(x plus one) equally −2x
- 9x−9x+1=−2x
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Similar expressions
- 9x−9(x-1)=−2x
9x−9(x+1)=−2x 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:
$$0 = 9 - 2 x$$
Move the summands with the unknown x
from the right part to the left part:
$$2 x = 9$$
Divide both parts of the equation by 2
We get the answer: x = 9/2
9*x-9*(x+1) = -2*x
Expand brackets in the left part
9*x-9*x-9*1 = -2*x
Looking for similar summands in the left part:
-9 = -2*x
Move free summands (without x)
from left part to right part, we given:
$$0 = 9 - 2 x$$
Move the summands with the unknown x
from the right part to the left part:
$$2 x = 9$$
Divide both parts of the equation by 2
x = 9 / (2)
We get the answer: x = 9/2
Sum and product of roots
[src]
sum
9/2
$$\frac{9}{2}$$
=
9/2
$$\frac{9}{2}$$
product
9/2
$$\frac{9}{2}$$
=
9/2
$$\frac{9}{2}$$
9/2
The graph