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Balancing and Equations

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by

Mr Mattock

on 7 March 2018

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Transcript of Balancing and Equations

Balancing and Equations
L.O. Solve a linear equation using balancing.
Examples
5x - 2 = x + 26



2x + 18 = 3x + 7
Main Activity
Main Activity
Examples
5x - 2 = 27



4x + 5 = 26
5x = 29
x = 5.8
4x = 21
x = 5.25
Is it 2.5? (Only decimal)
Is it 0? (not positive)
Is it 1? (Factor of all the others?)
Is it 4? (Appears most?)
Is it 6? (Only one with 3 factors > 1)
Starter
Worked
Example
Key
Examples

Activities
Activity
Answers

Can you work out what
value goes in the triangle?
Starter
Can you work out what
value goes in the triangle?
Triangle = 2.5
Equations and Balancing
2x + 3 = 8
Equations and Balancing
2x + 3 = 8
2x = 5

x = 2.5
Plenary
Write the equation shown by this mobile.

Can you work out the value of x?

Can you explain your logic?
Plenary
Write the equation shown by this mobile.
3x + 12 = 4x + 5
Can you work out the value of x?
x = 7
Can you explain your logic?
The 3x balances on each side leaving 12 = x + 5 and so x = 7.
Full transcript