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Cât face :a+2×{6+4×[100-3×(63-7×8)]}=1000 nu e urgent!

Răspuns :

a+2×{6+4×[100-3×(63-7×8)]}=1000
a+2×{6+4×[100-3×(63-56)]}=1000
a+2×[6+4×(100-3×7)]=1000
a+2×[6+4×(100-21)]=1000
a+2×(6+4×79)=1000
a+2×(6+316)=1000
a+2×322=1000
a+644=1000
a=1000-644
a=356