Mister Exam
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- Equation:
- Equation x^2-10*x-24=0
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Equation (x-4)^2-x^2=0
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Equation x*(x^2+8*x+16)=5*(x+4)
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Equation 13/(x-4)=2
- Express {x} in terms of y where:
- -11*x-3*y=14
- 3*x-7*y=13
- -13*x-7*y=16
- -12*x-10*y=-16
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Identical expressions
- thirteen /(x- four)= two
- 13 divide by (x minus 4) equally 2
- thirteen divide by (x minus four) equally two
- 13/x-4=2
- 13 divide by (x-4)=2
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Similar expressions
- 13/(x+4)=2
13/(x-4)=2 equation
The teacher will be very surprised to see your correct solution 😉
The solution
Detail solution
Given the equation:
Use proportions rule:
From a1/b1 = a2/b2 should a1*b2 = a2*b1,
In this case
so we get the equation
Move free summands (without x)
from left part to right part, we given:
Move the summands with the unknown x
from the right part to the left part:
Divide both parts of the equation by -1
We get the answer: x = 21/2
Use proportions rule:
From a1/b1 = a2/b2 should a1*b2 = a2*b1,
In this case
a1 = 13
b1 = -4 + x
a2 = 1
b2 = 1/2
so we get the equation
Move free summands (without x)
from left part to right part, we given:
Move the summands with the unknown x
from the right part to the left part:
Divide both parts of the equation by -1
x = -21/2 / (-1)
We get the answer: x = 21/2
The graph