Mister Exam
Other calculators
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How to use it?
- Equation:
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Equation 3*x^2-x-5=0
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Equation cos(x)=-3
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Equation x²-6x+5=0
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Equation (5+7*a)*15=-30
- Express {x} in terms of y where:
- 3*x+15*y=5
- -2*x+15*y=9
- 9*x-5*y=6
- -15*x-19*y=-2
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Identical expressions
- 5y+ two (three -4y)=2y+ twenty-one
- 5y plus 2(3 minus 4y) equally 2y plus 21
- 5y plus two (three minus 4y) equally 2y plus twenty minus one
- 5y+23-4y=2y+21
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Similar expressions
- 5y+2(3-4y)=2y-21
- 5y+2(3+4y)=2y+21
- 5y-2(3-4y)=2y+21
5y+2(3-4y)=2y+21 equation
The teacher will be very surprised to see your correct solution 😉
The solution
Detail solution
Given the linear equation:
Expand brackets in the left part
Looking for similar summands in the left part:
Move free summands (without y)
from left part to right part, we given:
$$- 3 y = 2 y + 15$$
Move the summands with the unknown y
from the right part to the left part:
$$\left(-5\right) y = 15$$
Divide both parts of the equation by -5
We get the answer: y = -3
5*y+2*(3-4*y) = 2*y+21
Expand brackets in the left part
5*y+2*3-2*4*y = 2*y+21
Looking for similar summands in the left part:
6 - 3*y = 2*y+21
Move free summands (without y)
from left part to right part, we given:
$$- 3 y = 2 y + 15$$
Move the summands with the unknown y
from the right part to the left part:
$$\left(-5\right) y = 15$$
Divide both parts of the equation by -5
y = 15 / (-5)
We get the answer: y = -3
The graph