Mister Exam
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How to use it?
- Equation:
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Equation -7x=13-2(8x-7)
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Equation 8x^2=0
- Equation 4x^2-100=0
- Equation 2/tg^2x+7/tgx+5=0
- Express {x} in terms of y where:
- -12*x+3*y=-9
- 14*x-16*y=14
- -10*x+18*y=6
- 9*x-18*y=6
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Identical expressions
- - seven x= thirteen - two (8x-7)
- minus 7x equally 13 minus 2(8x minus 7)
- minus seven x equally thirteen minus two (8x minus 7)
- -7x=13-28x-7
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Similar expressions
- -7x=13+2(8x-7)
- 7x=13-2(8x-7)
- -7x=13-2(8x+7)
- x^4-6*x^3-7*x^2+18=0
- 5-2x=11-7(x+2)
-7x=13-2(8x-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 the summands with the unknown x
from the right part to the left part:
$$9 x = 27$$
Divide both parts of the equation by 9
We get the answer: x = 3
-7*x = 13-2*(8*x-7)
Expand brackets in the right part
-7*x = 13-2*8*x+2*7
Looking for similar summands in the right part:
-7*x = 27 - 16*x
Move the summands with the unknown x
from the right part to the left part:
$$9 x = 27$$
Divide both parts of the equation by 9
x = 27 / (9)
We get the answer: x = 3
The graph