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vă rogg repede dau coroana ​

Vă Rogg Repede Dau Coroana class=

Răspuns :

PAtratelycfjfask

7(2x+3)+5(x-4)+21=4(3x+4)+13

14x+21+5x-20+21=12x+16+13

19x+21-20+21=12x+16+13

19x+22=12x+16+13

19x+22=12x+29

19x-12x=29-22

7x=29-22

7x=7

X=1

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