Mister Exam
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How to use it?
- Equation:
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Equation -15x=45
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Equation x^2=15
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Equation x^4=16
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Equation 3/5*x=1
- Express {x} in terms of y where:
- 18*x+17*y=-14
- -1*x-6*y=18
- 16*x-17*y=-15
- -4*x-4*y=19
- Sum of series:
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27
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Identical expressions
- (three x-5x+3)+(-3x-7x)= twenty-seven
- (3x minus 5x plus 3) plus ( minus 3x minus 7x) equally 27
- (three x minus 5x plus 3) plus ( minus 3x minus 7x) equally twenty minus seven
- 3x-5x+3+-3x-7x=27
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Similar expressions
- (3x-5x+3)+(3x-7x)=27
- (3x+5x+3)+(-3x-7x)=27
- (3x-5x-3)+(-3x-7x)=27
- (3x-5x+3)+(-3x+7x)=27
- (3x-5x+3)-(-3x-7x)=27
(3x-5x+3)+(-3x-7x)=27 equation
The teacher will be very surprised to see your correct solution 😉
The solution
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3*x - 5*x + 3 + -3*x - 7*x = 27
$$\left(- 7 x - 3 x\right) + \left(\left(- 5 x + 3 x\right) + 3\right) = 27$$
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:
$$- 12 x = 24$$
Divide both parts of the equation by -12
We get the answer: x = -2
(3*x-5*x+3)+(-3*x-7*x) = 27
Expand brackets in the left part
3*x-5*x+3+-3*x-7*x = 27
Looking for similar summands in the left part:
3 - 12*x = 27
Move free summands (without x)
from left part to right part, we given:
$$- 12 x = 24$$
Divide both parts of the equation by -12
x = 24 / (-12)
We get the answer: x = -2