решите уравнение 123 х+458+254 х+26=1238 2 (6 х+8) - 3 х=313 630: (63 х-42 х) + 53=68 708+139 х+24+341 х=1692 3 (7+4 х) - 8 х=201

1). 123 х + 458 + 254 х + 26 = 1238;

123 x + 254 x = 1238 - 26 - 458;

377 x = 754; x = 754 : 377;

x = 2;

2). 2 (6 х + 8) - 3 х = 313;

12 x + 16 - 3 x = 313; 12 x - 3 x = 313 - 16;

9 x = 297; x = 297 : 9;

x = 33;

3). 630 : (63 х - 42 х) + 53 = 68;

630 : 21 x + 53 = 68; 30/x = 68 - 53; 30/x = 15;

x = 30 : 15; x = 2;

4). 708 + 139 х + 24 + 341 х = 1692;

139 x + 341 x = 1692 - 24 - 708;

480 x = 960; x = 960 : 480;

x = 2;

5). 3 (7 + 4 х) - 8 х = 201;

21 + 12 x - 8 x = 201; 12 x - 8 x = 201 - 21;

4 x = 180; x = 180 : 4;

x = 45.