(68-m)+15=24 85-(14+n)=6 (524-m)-133=207 927-(267+n)=207

(68-m)+15=24;
68-m+15=24;
83-m=24;
-m=24-83;
-m=-59.


85-(14+n)=6;
85-14-n=6;
71-n=6;
-n=6-71;
-n=-65;
n=65;

(524-m)-133=207;
524-m-133=207;
391-m=207;
-m=207-391;
-m=-184;
m=184;


927-(267+n)=207;
927-267-n=207;
660-n=207;
-n=207-660;
-n=-453;
n=453;

1.
(68-m)+15=24
68-m+15=24
-m=24-68-15
-m=-59
m=59
2.
85-(14+n)=6
85-14-n=6
-n=6-85+14
-n=-65
n=65
3.
(524-m)-133=207
524-m-133=207
-m=207-524+133
-m=-184
m=184
4.
927-(267+n)=207
927-267-n=207
-n=207-927+267
-n=-453
n=453