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determina valoarea lui a din 546 + 127 - 96 ÷3+ 73 ×2 - ( 62 ÷ a+ 24÷2)-5×11=689

Răspuns :

a=? 546+127-96:3+73x2-(62:a+24:2)-5x11=689 673-32+146-(62:a+12)-55=689. 641+146-(62:a+12)-55=689. 787-(62:a+12)-55=689. 787-(62:a+12)=689+55 787-(62:a+12)=744. 62:a+12=744+787. 62:a+12=1531. 62:a=1531-12. 62:a=1519. a=1579:62. a=25,4677419?????