Mister Exam
Other calculators
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How to use it?
- Equation:
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Equation sin(x)=cos(x)
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Equation cos(x)=(-1/2)
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Equation (x+7)*(x-1)=0
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Equation e^x=2
- Express {x} in terms of y where:
- -15*x+18*y=0
- -18*x+9*y=4
- -6*x-2*y=7
- 6*x+10*y=-2
- 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