write in transposing method 4z+8=12_2z
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Nghi N. The Transposing Method transposes the algebraic terms (numbers, parameters, expression...) from side to side of the equation by changing them to the opposite signs, while keeping the equation balance
With the balance method you can solve equations by doing the same operation on both sides of the =-sign. The name comes from the thought behind it: A balance is an (old) weighing instrument with a scale/dish/weighing pan on both sides.
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4z + 8 = 12- 2z
4z +8 -8 = 12 -2z -8
4z = 4 -2z
4z +2z = 4- 2z +2z
6z = 4
6z/6 = 4/6
z = 2/3
= 0.66
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