Mister Exam
Other calculators
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How to use it?
- Express {x} in terms of y where:
- -14*x-5*y=-3
- -8*x+18*y=-20
- -5*x-20*y=-10
- -1*x+9*y=16
- Equation:
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Equation sinx=1
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Equation x^2+5*x-14=0
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Equation x+4|x|=3
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Equation 2^x=-4
- Sum of series:
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-1
- Derivative of:
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-1
- Integral of d{x}:
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-1
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Identical expressions
- seven *x- nine *y=- one
- 7 multiply by x minus 9 multiply by y equally minus 1
- seven multiply by x minus nine multiply by y equally minus one
- 7x-9y=-1
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Similar expressions
- 7*x+9*y=-1
- 7*x-9*y=+1
Express x in terms of y where 7*x-9*y=-1
The teacher will be very surprised to see your correct solution 😉
The solution
Detail solution
Given the linear equation:
Looking for similar summands in the left part:
Move the summands with the other variables
from left part to right part, we given:
$$7 x = 9 y - 1$$
Divide both parts of the equation by 7
We get the answer: x = -1/7 + 9*y/7
7*x-9*y = -1
Looking for similar summands in the left part:
-9*y + 7*x = -1
Move the summands with the other variables
from left part to right part, we given:
$$7 x = 9 y - 1$$
Divide both parts of the equation by 7
x = -1 + 9*y / (7)
We get the answer: x = -1/7 + 9*y/7
Rapid solution
[src]
1 9*re(y) 9*I*im(y)
x1 = - - + ------- + ---------
7 7 7
$$x_{1} = \frac{9 \operatorname{re}{\left(y\right)}}{7} + \frac{9 i \operatorname{im}{\left(y\right)}}{7} - \frac{1}{7}$$
x1 = 9*re(y)/7 + 9*i*im(y)/7 - 1/7