Răspuns :
75*x=750=>x=750:75=10
21x=8400=>x=8400:21=400
X*105=1050=>x=1050:105=10
X*32=906=>x=906:32=28 rest 10
21x=8400=>x=8400:21=400
X*105=1050=>x=1050:105=10
X*32=906=>x=906:32=28 rest 10