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(1000-h x 2- 25x4) :6 = 143

Răspuns :

Rezolvare prin Metoda mersului invers:
(1000-hx2-25x4):6=143 
(1000-hx2-100):6=143
1000-hx2-100=143x6
1000-hx2-100= 858
1000-hx2=858+100
1000-hx2=958
hx2 = 1000-958
hx2 = 42
h = 42:2
h = 21