add
458+x=789
x=331
20.m=140
m=7
582-k=225
k=247
75 divide by 3
25
982+m=1340
m=358
45.x=135
x=3
789-m=179
m=610
85 divide by 6
14.1666 or 14
998+y=1850
y=852
45.m=180
m=4
987-m=234
m=753
95 divide by 4
23.75 or 23
785+n=895
n=110
56.m=392
m=7
1970-h=457
h=1513
145 divide by 8
18.125 or 18
989+z=2589
z=1600
26. z=598
z=23
2598-z=234
z=2364
248 divide by 6
41.3333 or 41