Mister Exam
Other calculators
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How to use it?
- Equation:
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Equation 12-x=x
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Equation 4x+5=2x-7
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Equation 3*x^2-9=0
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Equation x^2-x+1=0
- Express {x} in terms of y where:
- 20*x+9*y=17
- 11*x-11*y=-17
- -17*x-12*y=-9
- -6*x+1*y=-5
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Identical expressions
- (x- four)*(y- seven)= zero
- (x minus 4) multiply by (y minus 7) equally 0
- (x minus four) multiply by (y minus seven) equally zero
- (x-4)(y-7)=0
- x-4y-7=0
- (x-4)*(y-7)=O
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Similar expressions
- (x-4)*(y+7)=0
- (x+4)*(y-7)=0
(x-4)*(y-7)=0 equation
The teacher will be very surprised to see your correct solution 😉
The solution
Detail solution
Given the equation:
Expand expressions:
Reducing, you get:
Move free summands (without x)
from left part to right part, we given:
$$x y - 7 x - 4 y = -28$$
Move the summands with the other variables
from left part to right part, we given:
$$x y + \left(-7\right) x = 4 y - 28$$
Divide both parts of the equation by (-7*x + x*y)/x
We get the answer: x = 4
(x-4)*(y-7) = 0
Expand expressions:
28 - 7*x - 4*y + x*y = 0
Reducing, you get:
28 - 7*x - 4*y + x*y = 0
Move free summands (without x)
from left part to right part, we given:
$$x y - 7 x - 4 y = -28$$
Move the summands with the other variables
from left part to right part, we given:
$$x y + \left(-7\right) x = 4 y - 28$$
Divide both parts of the equation by (-7*x + x*y)/x
x = -28 + 4*y / ((-7*x + x*y)/x)
We get the answer: x = 4
The graph