Mister Exam
Other calculators
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How to use it?
- Equation:
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Equation 4x-x^2=x^2-x+3
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Equation x^2-21=4x
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Equation 9*x^2-1=0
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Equation 2*sin(x)*cos(x)=0
- Express {x} in terms of y where:
- -1*x+1*y=-13
- -20*x-20*y=11
- 9*x-1*y=-10
- -19*x+20*y=-11
- Integral of d{x}:
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12
- Canonical form:
- 12
- Derivative of:
- 12
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Identical expressions
- 7x- four (x+ three)= twelve
- 7x minus 4(x plus 3) equally 12
- 7x minus four (x plus three) equally twelve
- 7x-4x+3=12
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Similar expressions
- 7x-4(x-3)=12
- 7x+4(x+3)=12
7x-4(x+3)=12 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:
$$3 x = 24$$
Divide both parts of the equation by 3
We get the answer: x = 8
7*x-4*(x+3) = 12
Expand brackets in the left part
7*x-4*x-4*3 = 12
Looking for similar summands in the left part:
-12 + 3*x = 12
Move free summands (without x)
from left part to right part, we given:
$$3 x = 24$$
Divide both parts of the equation by 3
x = 24 / (3)
We get the answer: x = 8