Mister Exam
Other calculators
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How to use it?
- Equation:
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Equation 2x^2-8=0
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Equation 8x-15=-12+5x
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Equation 2x-2=0
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Equation (x-4)²+(x+9)²=2x²
- Express {x} in terms of y where:
- 12*x+1*y=11
- 11*x-6*y=1
- 8*x-1*y=18
- -17*x-6*y=1
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Identical expressions
- two (x- twenty)=x
- 2(x minus 20) equally x
- two (x minus twenty) equally x
- 2x-20=x
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Similar expressions
- 2(x+20)=x
- x^3+12*x-20=0
- (a+2)2x-20=5a+4x
- 2*(x-20)*(x+45)=0
- 4200*0.2*(x-20)/(0.1*(100-x))=880
2(x-20)=x equation
The teacher will be very surprised to see your correct solution 😉
The solution
Detail solution
Given the linear equation:
Expand brackets in the left part
Move free summands (without x)
from left part to right part, we given:
$$2 x = x + 40$$
Move the summands with the unknown x
from the right part to the left part:
$$x = 40$$
We get the answer: x = 40
2*(x-20) = x
Expand brackets in the left part
2*x-2*20 = x
Move free summands (without x)
from left part to right part, we given:
$$2 x = x + 40$$
Move the summands with the unknown x
from the right part to the left part:
$$x = 40$$
We get the answer: x = 40
The graph