Mister Exam
Other calculators
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How to use it?
- Equation:
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Equation x^2+3x+2=0
- Equation x+y=5
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Equation sin(x)=3
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Equation x^2-11*x+30=0
- Express {x} in terms of y where:
- 6*x+17*y=-11
- -13*x+7*y=-15
- -14*x-8*y=20
- 9*x+14*y=-10
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Identical expressions
- (x+ four)*(y- seven)= zero
- (x plus 4) multiply by (y minus 7) equally 0
- (x plus 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:
$$x y + \left(-7\right) x = \left(-4\right) y + 28$$
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:
$$x y + \left(-7\right) x = \left(-4\right) y + 28$$
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