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2014-11-06T18:12:40+02:00
Pune-ti Microsoft Mathematics ! Rezolvi mai usor !
2014-11-06T18:24:13+02:00
[15x(10x-11)-120]x10=125+25; [ 15x(10x-11)-120]=150:10;
[15x(10x-11)-120]= 15; 15(10x-11) =120+15;(10x-11)= 135:15; 10x-1=9; 10x=10=> x=1