Mister Exam
Other calculators
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How to use it?
- Equation:
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Equation x^2=-100
-
Equation 2x^2-3x+1=0
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Equation -7*x=4
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Equation 10x-2(4x-5)=2x+10
- Express {x} in terms of y where:
- 4*x-4*y=-19
- 5*x-4*y=14
- -16*x+18*y=9
- 4*x-1*y=12
- Graphing y =:
- 5x+7
- Inequation:
- 5x+7
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Identical expressions
- seven x- eight =5x+7
- 7x minus 8 equally 5x plus 7
- seven x minus eight equally 5x plus 7
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Similar expressions
- 7x-8=5x-7
- 7x+8=5x+7
- (x^2-5*x+7)^2-(x-2)(x-3)=1
- 0,28=0.001+17*x^-8,11
- 33+8*x=-5*x+72
- 1*x^2-17*x-80=0
- (x-5)*(x+7)-2*(x-20)=0
7x-8=5x+7 equation
The teacher will be very surprised to see your correct solution 😉
The solution
Detail solution
Given the linear equation:
Move free summands (without x)
from left part to right part, we given:
$$7 x = 5 x + 15$$
Move the summands with the unknown x
from the right part to the left part:
$$2 x = 15$$
Divide both parts of the equation by 2
We get the answer: x = 15/2
7*x-8 = 5*x+7
Move free summands (without x)
from left part to right part, we given:
$$7 x = 5 x + 15$$
Move the summands with the unknown x
from the right part to the left part:
$$2 x = 15$$
Divide both parts of the equation by 2
x = 15 / (2)
We get the answer: x = 15/2
Sum and product of roots
[src]
sum
15/2
$$\frac{15}{2}$$
=
15/2
$$\frac{15}{2}$$
product
15/2
$$\frac{15}{2}$$
=
15/2
$$\frac{15}{2}$$
15/2