Mister Exam
Other calculators
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How to use it?
- Equation:
- Equation x^4-81=0
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Equation sqrt(2+log2(x))=log2(x)
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Equation 8x-4=9x-2(2x-7)
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Equation k^2-2*k-3=0
- Express {x} in terms of y where:
- 15*x-17*y=19
- 9*x-8*y=6
- 15*x+15*y=16
- 8*x+7*y=-13
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Identical expressions
- 8x- four =9x- two (2x- seven)
- 8x minus 4 equally 9x minus 2(2x minus 7)
- 8x minus four equally 9x minus two (2x minus seven)
- 8x-4=9x-22x-7
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Similar expressions
- 8x-4=9x+2(2x-7)
- x+1/8*(x-4/5*(x+7))=2x-1/6
- 8x+4=9x-2(2x-7)
- 8x-4=9x-2(2x+7)
- ax^2+8*x-4*a-16=0
8x-4=9x-2(2x-7) equation
The teacher will be very surprised to see your correct solution 😉
The solution
Detail solution
Given the linear equation:
Expand brackets in the right part
Looking for similar summands in the right part:
Move free summands (without x)
from left part to right part, we given:
$$8 x = 5 x + 18$$
Move the summands with the unknown x
from the right part to the left part:
$$3 x = 18$$
Divide both parts of the equation by 3
We get the answer: x = 6
8*x-4 = 9*x-2*(2*x-7)
Expand brackets in the right part
8*x-4 = 9*x-2*2*x+2*7
Looking for similar summands in the right part:
-4 + 8*x = 14 + 5*x
Move free summands (without x)
from left part to right part, we given:
$$8 x = 5 x + 18$$
Move the summands with the unknown x
from the right part to the left part:
$$3 x = 18$$
Divide both parts of the equation by 3
x = 18 / (3)
We get the answer: x = 6
The graph