Mister Exam
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How to use it?
- Equation:
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Equation 81^cosx-12*9^cosx+27=0
- Equation |3*8-9|-7*|9-3*8|=x
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Equation 119*z^2+6=(7*z+1)*(17*z+7)
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Equation 16sin^4(x)+8cos2(x)-7=0
- Express {x} in terms of y where:
- 10*x-1*y=10
- 15*x-17*y=19
- 9*x-8*y=6
- 15*x+15*y=16
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Identical expressions
- | three * eight - nine |- seven *| nine - three * eight |=x
- module of 3 multiply by 8 minus 9| minus 7 multiply by |9 minus 3 multiply by 8| equally x
- module of three multiply by eight minus nine | minus seven multiply by | nine minus three multiply by eight | equally x
- |38-9|-7|9-38|=x
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Similar expressions
- |3*8-9|+7*|9-3*8|=x
- |3*8+9|-7*|9-3*8|=x
- |3*8-9|-7*|9+3*8|=x
|3*8-9|-7*|9-3*8|=x 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:
$$0 = x + 90$$
Move the summands with the unknown x
from the right part to the left part:
$$- x = 90$$
Divide both parts of the equation by -1
We get the answer: x = -90
(|3*8-9|)-7*(|9-3*8|) = x
Expand brackets in the left part
3*8-9-7*9+7*3*8 = x
Looking for similar summands in the left part:
-90 = x
Move free summands (without x)
from left part to right part, we given:
$$0 = x + 90$$
Move the summands with the unknown x
from the right part to the left part:
$$- x = 90$$
Divide both parts of the equation by -1
x = 90 / (-1)
We get the answer: x = -90