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ex 3 va rog dau coronița

Ex 3 Va Rog Dau Coronița class=

Răspuns :

a)  10x + 20X +30x +40 x = 26 la patrat - 24 la patrat <=>
100x = 676 - 576 <=> 100x = 100 <=> x = 100/100 <=> x= 1
b ul este incomplet
c) 11x - 12 = 1*2*3*4*5 <=> 11x - 12 = 120 <=> 11x= 120 + 12 <=> 11x= 132 <=> x = 132/11 <=> x = 12