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[(x-28x2)x3+5]x12=1644 plzz repede

Răspuns :

[ ( x - 28 • 2 ) • 3 + 5 ] • 12 = 1644

( x - 56 ) • 3 + 5 = 1644 : 12

( x - 56 ) • 3 + 5 = 137

( x - 56 ) • 3 = 137 - 5

( x - 56 ) • 3 = 132

x - 56 = 132 : 3

x - 56 = 44

x = 44 + 56

x = 100