1) (3728-х)÷ 54= 69 2) (148+х)× 3= 1584 3) 992÷(130-х)= 62 4) (715-х)×83= 8383 5) 2244÷ (111х-9х)=22 6) 999+(602х-582х)= 2199 7) 1000-(501х+19х)= 480

1) 3728/54-х/54-69=0
69,037-х/54-69=0
0,037-х/54=0
х=(-(-0,037))*54=0,037*54=1,99

2) 444+х*3-1584=0
-1140+х*3=0
х=1140/3=380

3) 992/130-х=0

4) 59345-х*83-8383=0
50962-х=0
х=-50962/83=50962/83=614

5) 2244/192х-22=0
22/х-22=0

6) 999+20х-2199=0
-1200+20х=0
х=1200/20=60

7) 1000-520х-480=0
520-520х=0
х=-520/520=520/520=1