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a fost răspuns

vreau rezolvare la exercitiul 5x+18+20y=43 determinati 15x+38+60y

Răspuns :

5x+18+20y=43 => 5x+20y=25 
15x+60y=25x3
15x+60y=75
15x+38+60y= 113
Mihaelap
5(x + 4y) = 43 - 18
5(x + 4y) = 25
x + 4y = 5
15(x + 4y) + 38 = 15 * 5 + 38 = 75 + 38 = 113