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36a+27b=153
4a+3b=?


Răspuns :

36a+27b=153
9(4a+3b)=153
4a+3b=153:9
4a+3b=17


[tex]36a+27b=153 \\ 9*(4a+3b)=153 \\ 4a+3b=153:9 \\ 4a+3b=17[/tex]