Mister Exam
Other calculators
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How to use it?
- Equation:
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Equation -20*(x-13)=-220
-
Equation x-x/12=55/12
-
Equation 3^x=81
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Equation 12-x^2=11
- Express {x} in terms of y where:
- 18*x+19*y=7
- 16*x-15*y=4
- 1*x+6*y=6
- 20*x+9*y=17
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Identical expressions
- two - three (two x+2)= five -4x.
- 2 minus 3(2x plus 2) equally 5 minus 4x.
- two minus three (two x plus 2) equally five minus 4x.
- 2-32x+2=5-4x.
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Similar expressions
- 15x^2-32x+21=0
- 2-3(2x+2)=5+4x.
- 2+3(2x+2)=5-4x.
- 2-3(2x-2)=5-4x.
2-3(2x+2)=5-4x. 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:
$$- 6 x = 9 - 4 x$$
Move the summands with the unknown x
from the right part to the left part:
$$\left(-2\right) x = 9$$
Divide both parts of the equation by -2
We get the answer: x = -9/2
2-3*(2*x+2) = 5-4*x
Expand brackets in the left part
2-3*2*x-3*2 = 5-4*x
Looking for similar summands in the left part:
-4 - 6*x = 5-4*x
Move free summands (without x)
from left part to right part, we given:
$$- 6 x = 9 - 4 x$$
Move the summands with the unknown x
from the right part to the left part:
$$\left(-2\right) x = 9$$
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