Mister Exam
Other calculators
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How to use it?
- Equation:
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Equation -7x=13-2(8x-7)
- Equation x^4-81=0
- Equation arctg(x/y)
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Equation tg^2(x)+ctg^2(x)+3*(tg(x)+ctg(x))+4=0
- Express {x} in terms of y where:
- 9*x-8*y=6
- 15*x+15*y=16
- 8*x+7*y=-13
- -4*x+18*y=-14
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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
- 3(x+2)^2+(2x-1)^2-7(x+3)(x-3)=28
- -7x=13+2(8x-7)
- -7x=13-2(8x+7)
- 7x=13-2(8x-7)
-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