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(e-5×6+10×5)-50+4×8=42

Răspuns :

(e-30+50)-50+32=42
(e-30+50)-50=42-32
(e-30+50)-50=10
e-30+50=10+50
e-30+50=60
e-30=60-50
e-30=10
e=10+30=40
(e-5x6+10x5)-50+4x8=42
(e-30+50)-50=42-32
e-30+50-50=10
e-30+50=10+50
e-30+50=60
e-30=60-50
e-30=10
e=10+30
e=40