Реши уравнения (х+3)*5=6825 5859:7+х=10989 6*х+908=4052 34:b+1257=1259

1) (х + 3) * 5 = 6825;

5 * x + 3 * 5 = 6825;

5x + 15 = 6825;

5x = 6825 - 15;

5x = 6810;

x = 6810 : 5;

x = 1362.

2) 5859 : 7 + х = 10989;

837 + x = 10989;

x = 10989 : 837;

x = 13,13.

3) 6 * х + 908 = 4052;

6x + 908 = 4052;

6x = 4052 - 908;

6x = 3144;

x = 3144 : 6;

x = 524.

4) 34 : b + 1257 = 1259;

34/b + 1257 = 1259;

Домножим обе доли на b:

34/b * b + 1257 * b = 1259 * b;

34 + 1257b = 1259b;

 -1259b + 1257b = -34;

-2b = -34;

b = -34 : (-2);

b = 17.