Mister Exam
Other calculators
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How to use it?
- Equation:
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Equation sin(x/3)=-1/2
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Equation (x^2-1)/(x+2)=4x
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Equation 1-7(4+2x)=-9-4x
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Equation (x+9)^2=(x+6)^2
- Express {x} in terms of y where:
- -13*x+9*y=1
- -10*x-16*y=-6
- 10*x+9*y=-4
- 1*x+7*y=8
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Identical expressions
- one - seven (four +2x)=- nine -4x
- 1 minus 7(4 plus 2x) equally minus 9 minus 4x
- one minus seven (four plus 2x) equally minus nine minus 4x
- 1-74+2x=-9-4x
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Similar expressions
- 1-7(4+2x)=+9-4x
- 1-7*(4+2x)=-9-4x
- 1+7(4+2x)=-9-4x
- 1-7*(4+2*x)=-9-4*x
- 1-7(4-2x)=-9-4x
- 0,5(8x+1)=15-(9-4x)
- 1-7*(4+2*x)=-9-4x
- 1-7(4+2x)=-9+4x
1-7(4+2x)=-9-4x 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:
$$- 14 x = 18 - 4 x$$
Move the summands with the unknown x
from the right part to the left part:
$$\left(-10\right) x = 18$$
Divide both parts of the equation by -10
We get the answer: x = -9/5
1-7*(4+2*x) = -9-4*x
Expand brackets in the left part
1-7*4-7*2*x = -9-4*x
Looking for similar summands in the left part:
-27 - 14*x = -9-4*x
Move free summands (without x)
from left part to right part, we given:
$$- 14 x = 18 - 4 x$$
Move the summands with the unknown x
from the right part to the left part:
$$\left(-10\right) x = 18$$
Divide both parts of the equation by -10
x = 18 / (-10)
We get the answer: x = -9/5
Sum and product of roots
[src]
sum
-9/5
$$- \frac{9}{5}$$
=
-9/5
$$- \frac{9}{5}$$
product
-9/5
$$- \frac{9}{5}$$
=
-9/5
$$- \frac{9}{5}$$
-9/5
The graph