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Equació = Equilibri

Com que una equació és un equilibri, 

per a trobar una equació equivalent

FEM EL MATEIX ALS DOS MEMBRES

Sumar : begin mathsize 12px style bold 3 bold x bold space bold minus bold space bold 2 bold space bold equals bold space bold 6 bold x bold space bold plus bold space bold 5 bold space bold space bold left right double arrow bold space bold 3 bold x bold space bold minus bold space bold 2 bold space bold plus bold space bold 2 bold space bold equals bold space bold 6 bold x bold space bold plus bold space bold 5 bold space bold plus bold space bold 2 end style

Restar: begin mathsize 12px style bold 5 bold italic x bold space bold plus bold space bold 6 bold space bold equals bold thin space bold 2 bold italic x bold space bold plus bold space bold 3 bold space bold space bold left right double arrow bold space bold 5 bold italic x bold space bold minus bold space bold 2 bold italic x bold space bold plus bold space bold 6 bold space bold equals bold space bold 2 bold italic x bold space bold minus bold space bold 2 bold italic x bold space bold plus bold space bold 3 end style

Multiplicar: begin mathsize 12px style fraction numerator bold 3 bold x bold minus bold 15 over denominator bold 6 end fraction bold equals fraction numerator bold 2 bold x bold plus bold 8 over denominator bold 6 end fraction bold left right double arrow bold 3 bold italic x bold minus bold 15 bold equals bold 2 bold italic x bold plus bold 8 end style

Dividir: begin mathsize 12px style bold 5 bold italic x bold equals bold 15 bold left right double arrow fraction numerator bold 5 bold x over denominator bold 5 end fraction bold equals bold 15 over bold 5 end style

 

 



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