Răspuns :
100-(a+4×2-14:7)=43
a+4×2-14:7=100-43
a+4×2-14:7=57
a+8-2=57
a+8=57+2
a+8=59
a=59-8
a=51
a+4×2-14:7=100-43
a+4×2-14:7=57
a+8-2=57
a+8=57+2
a+8=59
a=59-8
a=51