Mister Exam
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How to use it?
- Equation:
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Equation x^2+7=0
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Equation x+2=0
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Equation 2x=0
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Equation -15x=45
- Express {x} in terms of y where:
- -15*x-13*y=-20
- -15*x-19*y=2
- 4*x+4*y=13
- -4*x+14*y=-2
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Identical expressions
- seven - three (x+ one)= six
- 7 minus 3(x plus 1) equally 6
- seven minus three (x plus one) equally six
- 7-3x+1=6
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Similar expressions
- 8x-3:7-3x+1:10=2
- 7+3(x+1)=6
- 8-3/7-3x+1/10=2
- 8*x-3/7-3*x+1/10=2
- 7^((-3)*x)+1=343
- 7-3(x-1)=6
7-3(x+1)=6 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:
$$- 3 x = 2$$
Divide both parts of the equation by -3
We get the answer: x = -2/3
7-3*(x+1) = 6
Expand brackets in the left part
7-3*x-3*1 = 6
Looking for similar summands in the left part:
4 - 3*x = 6
Move free summands (without x)
from left part to right part, we given:
$$- 3 x = 2$$
Divide both parts of the equation by -3
x = 2 / (-3)
We get the answer: x = -2/3
Sum and product of roots
[src]
sum
-2/3
$$- \frac{2}{3}$$
=
-2/3
$$- \frac{2}{3}$$
product
-2/3
$$- \frac{2}{3}$$
=
-2/3
$$- \frac{2}{3}$$
-2/3
The graph