Mister Exam
Other calculators
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How to use it?
- Equation:
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Equation cos(x)=-(1/2)
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Equation (x-3)*(x+4)=0
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Equation 11x-9=4x+19
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Equation x^4=(4*x-21)^2
- Express {x} in terms of y where:
- -8*x-12*y=15
- 9*x+8*y=6
- 18*x+14*y=-11
- -5*x+6*y=19
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Identical expressions
- three (five -2x)+4x=-7x
- 3(5 minus 2x) plus 4x equally minus 7x
- three (five minus 2x) plus 4x equally minus 7x
- 35-2x+4x=-7x
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Similar expressions
- x^2=18-7*x
- 3(5+2x)+4x=-7x
- 3(5-2x)-4x=-7x
- 9-7(x+3)=5-6x
- 3(5-2x)+4x=+7x
3(5-2x)+4x=-7x 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 x)
from left part to right part, we given:
$$- 2 x = - 7 x - 15$$
Move the summands with the unknown x
from the right part to the left part:
$$5 x = -15$$
Divide both parts of the equation by 5
We get the answer: x = -3
3*(5-2*x)+4*x = -7*x
Expand brackets in the left part
3*5-3*2*x+4*x = -7*x
Looking for similar summands in the left part:
15 - 2*x = -7*x
Move free summands (without x)
from left part to right part, we given:
$$- 2 x = - 7 x - 15$$
Move the summands with the unknown x
from the right part to the left part:
$$5 x = -15$$
Divide both parts of the equation by 5
x = -15 / (5)
We get the answer: x = -3
The graph