Mister Exam
Other calculators
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How to use it?
- Express {x} in terms of y where:
- 18*x-20*y=-7
- -13*x+7*y=11
- -19*x-14*y=-8
- 4*x+18*y=-14
- Equation:
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Equation (x^2-1)/(x+2)=4x
-
Equation 3*x+5+(x+5)=(1-x)+4
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Equation cos(x)=3/4
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Equation cos(x)=(1/2)
- Integral of d{x}:
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-7
- Limit of the function:
- -7
- Derivative of:
- -7
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Identical expressions
- eighteen *x- twenty *y=- seven
- 18 multiply by x minus 20 multiply by y equally minus 7
- eighteen multiply by x minus twenty multiply by y equally minus seven
- 18x-20y=-7
-
Similar expressions
- 18*x-20*y=+7
- 18*x+20*y=-7
Express x in terms of y where 18*x-20*y=-7
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:
$$18 x = 20 y - 7$$
Divide both parts of the equation by 18
We get the answer: x = -7/18 + 10*y/9
18*x-20*y = -7
Looking for similar summands in the left part:
-20*y + 18*x = -7
Move the summands with the other variables
from left part to right part, we given:
$$18 x = 20 y - 7$$
Divide both parts of the equation by 18
x = -7 + 20*y / (18)
We get the answer: x = -7/18 + 10*y/9
Rapid solution
[src]
7 10*re(y) 10*I*im(y)
x1 = - -- + -------- + ----------
18 9 9
$$x_{1} = \frac{10 \operatorname{re}{\left(y\right)}}{9} + \frac{10 i \operatorname{im}{\left(y\right)}}{9} - \frac{7}{18}$$
x1 = 10*re(y)/9 + 10*i*im(y)/9 - 7/18