1)a+2546=3764, 3764-2546=1218, 1218+2546=3764
2)46789-b=5788, 46789-5788=41001, 46789-41001=5788
3)c*345=43815, 43815/345=127, 127*345=43815
4)2898/b=23, 2898/23=126, 2898/126=23
5)x/540=360, 540*360=194400, 194400/540=360
6)y-7127=835, 7127+835=7962, 7962-7127=835