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[260 - (7x + 5): 4] + 12 = 248


Răspuns :

Răspuns:

[ 260 - ( 7x+5) ÷4]= 248-12

260- ( 7x+5)= 236×4

260-( 7x+5)= 944

7x+5= 684

7x= 679

x=97