(1,5 ĐIỂM) TÌM X, BIẾT

Question

3 :4 3x= − = −− =xb)  3 5.+5 7( ) ( ) − = +7 x 3 5 x 57x− =21 5x+252x=46

Answer

3 :4 3x= − = −− =xb)  3 5.+5 7( ) ( ) − = +7 x 3 5 x 57x− =21 5x+252x=46