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5.6+2×(0.3x+8.5)=5×(x+4


Răspuns :

5.6x+2(0.3x+8.5)=5(x+4)=>
5.6x+0.6x+17=5x+20=>
6.2x+17=5x+20=>6.2x-5x=20-17=>
1.2x=3=>x=3/1.2=>x=2.5