Mister Exam
Other calculators
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How to use it?
- Equation:
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Equation x/3/7=9/14
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Equation 8⋅(7+x)−5x=4x−64.
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Equation 5,8-1,6x=0,3x-1,8
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Equation 2x+9=13-x
- Express {x} in terms of y where:
- -17*x-12*y=-4
- 3*x-11*y=-7
- -19*x-12*y=13
- 2*x+13*y=-7
- Graphing y =:
- (x+7)/(x-5)
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Identical expressions
- (x+ seven)/(x- five)= four
- (x plus 7) divide by (x minus 5) equally 4
- (x plus seven) divide by (x minus five) equally four
- x+7/x-5=4
- (x+7) divide by (x-5)=4
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Similar expressions
- (x^2+9*x+7)/((x-5)^2*(x+1)^2)=-(3/((x-5)*(x+1)))
- (x+7)/(x+5)=4
- (x-7)/(x-5)=4
(x+7)/(x-5)=4 equation
The teacher will be very surprised to see your correct solution 😉
The solution
Detail solution
Given the equation:
$$\frac{x + 7}{x - 5} = 4$$
Multiply the equation sides by the denominator -5 + x
we get:
$$x + 7 = 4 x - 20$$
Move free summands (without x)
from left part to right part, we given:
$$x = 4 x - 27$$
Move the summands with the unknown x
from the right part to the left part:
$$\left(-3\right) x = -27$$
Divide both parts of the equation by -3
We get the answer: x = 9
$$\frac{x + 7}{x - 5} = 4$$
Multiply the equation sides by the denominator -5 + x
we get:
$$x + 7 = 4 x - 20$$
Move free summands (without x)
from left part to right part, we given:
$$x = 4 x - 27$$
Move the summands with the unknown x
from the right part to the left part:
$$\left(-3\right) x = -27$$
Divide both parts of the equation by -3
x = -27 / (-3)
We get the answer: x = 9