Folosind egalitățile: x×a=135; x×b=73 si m+n=17, calculati
a) x×a+x×b -(8×m+8×n);
b) 3×x×a×x×b+5×m+5×n;
c) 100+a×x-x×b;
d) (5×m+5×n)×(40+x×a+x×b)​