Mister Exam
Other calculators
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How to use it?
- Equation:
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Equation x^2-4x+6=0
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Equation cos(4*x)=0
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Equation x^2-21=4x
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Equation 5x-9=3x+1
- Express {x} in terms of y where:
- -12*x+17*y=-11
- -8*x-16*y=18
- -10*x-19*y=3
- -4*x+18*y=10
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Identical expressions
- (eighteen -x)- seven (2x- four)=5x+ twenty
- (18 minus x) minus 7(2x minus 4) equally 5x plus 20
- (eighteen minus x) minus seven (2x minus four) equally 5x plus twenty
- 18-x-72x-4=5x+20
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Similar expressions
- (18-x)-7(2x-4)=5x-20
- 18-x-7*(2x-4)=5x+20
- 25(sin(5x))^2-36sin(5x)+20=0
- 125^x+20^x=2^(3x+1)
- (18-x)-7(2x+4)=5x+20
- (18+x)-7(2x-4)=5x+20
- (18-x)+7(2x-4)=5x+20
(18-x)-7(2x-4)=5x+20 equation
The teacher will be very surprised to see your correct solution 😉
The solution
You have entered
[src]
18 - x - 7*(2*x - 4) = 5*x + 20
$$\left(18 - x\right) - 7 \left(2 x - 4\right) = 5 x + 20$$
Detail solution
Given the linear equation:
Expand brackets in the left part
Looking for similar summands in the left part:
Move free summands (without x)
from left part to right part, we given:
$$- 15 x = 5 x - 26$$
Move the summands with the unknown x
from the right part to the left part:
$$\left(-20\right) x = -26$$
Divide both parts of the equation by -20
We get the answer: x = 13/10
(18-x)-7*(2*x-4) = 5*x+20
Expand brackets in the left part
18-x-7*2*x+7*4 = 5*x+20
Looking for similar summands in the left part:
46 - 15*x = 5*x+20
Move free summands (without x)
from left part to right part, we given:
$$- 15 x = 5 x - 26$$
Move the summands with the unknown x
from the right part to the left part:
$$\left(-20\right) x = -26$$
Divide both parts of the equation by -20
x = -26 / (-20)
We get the answer: x = 13/10
Sum and product of roots
[src]
sum
13 -- 10
$$\frac{13}{10}$$
=
13 -- 10
$$\frac{13}{10}$$
product
13 -- 10
$$\frac{13}{10}$$
=
13 -- 10
$$\frac{13}{10}$$
13/10
The graph