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-4)/x=(2*x+10)/(x+4)
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Equation x+1/3=x-1/2
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Equation |x|=4
- Express {x} in terms of y where:
- -20*x-20*y=-18
- -2*x-5*y=-12
- -3*x-13*y=-7
- -11*x-16*y=-13
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Identical expressions
- 9x− seven (x+ one)=−2x.
- 9x−7(x plus 1) equally −2x.
- 9x− seven (x plus one) equally −2x.
- 9x−7x+1=−2x.
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Similar expressions
- 9x−7(x-1)=−2x.
9x−7(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:
$$2 x = 7 - 2 x$$
Move the summands with the unknown x
from the right part to the left part:
$$4 x = 7$$
Divide both parts of the equation by 4
We get the answer: x = 7/4
9*x-7*(x+1) = -2*x
Expand brackets in the left part
9*x-7*x-7*1 = -2*x
Looking for similar summands in the left part:
-7 + 2*x = -2*x
Move free summands (without x)
from left part to right part, we given:
$$2 x = 7 - 2 x$$
Move the summands with the unknown x
from the right part to the left part:
$$4 x = 7$$
Divide both parts of the equation by 4
x = 7 / (4)
We get the answer: x = 7/4
Sum and product of roots
[src]
sum
7/4
$$\frac{7}{4}$$
=
7/4
$$\frac{7}{4}$$
product
7/4
$$\frac{7}{4}$$
=
7/4
$$\frac{7}{4}$$
7/4
The graph