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 16*x^2/5-5=0
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Equation x^2+14*x+40=0
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Equation x^2-18=7x
- Express {x} in terms of y where:
- 12*x+2*y=-9
- 2*x+6*y=-2
- -19*x-16*y=3
- -18*x+10*y=12
- Derivative of:
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x+9
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Identical expressions
- 7x-(three +2x)=x+ nine
- 7x minus (3 plus 2x) equally x plus 9
- 7x minus (three plus 2x) equally x plus nine
- 7x-3+2x=x+9
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Similar expressions
- 7x-(3-2x)=x+9
- 7x+(3+2x)=x+9
- 7x-(3+2x)=x-9
7x-(3+2x)=x+9 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
Looking for similar summands in the left part:
Move free summands (without x)
from left part to right part, we given:
$$5 x = x + 12$$
Move the summands with the unknown x
from the right part to the left part:
$$4 x = 12$$
Divide both parts of the equation by 4
We get the answer: x = 3
7*x-(3+2*x) = x+9
Expand brackets in the left part
7*x-3-2*x = x+9
Looking for similar summands in the left part:
-3 + 5*x = x+9
Move free summands (without x)
from left part to right part, we given:
$$5 x = x + 12$$
Move the summands with the unknown x
from the right part to the left part:
$$4 x = 12$$
Divide both parts of the equation by 4
x = 12 / (4)
We get the answer: x = 3
The graph