1) (14+х7):7=42-37 2) х(24-16)=100-32:87 3) 39+х(42:7)-(19+18)=26 4) х(465+387-835)=251-72:611 5) (1350+х15):15=3507-3237

1. 14 + х 7 = 5 7,

х 7 = 35 - 14,

х 7 = 21,

х = 21 : 7,

х = 3.

2. 8 х = 100 - 4 7,

8 х = 100 - 28,

8 х = 72,

х = 72 : 8,

х = 9.

3. 39 + 6 х - 37 = 26,

6 х + 2 = 26,

6 х = 26 - 2,

6 х = 24,

х = 24 : 6,

х = 4.

4. 17 х = 251 - 12 11,

17 х = 251 - 132,

17 х = 119,

х = 119 : 17,

х = 7.

5. 1350 + 15 х = 270 15,

1350 + 15 х = 4050,

15 х = 4050 - 1350,

15 х = 2700,

х = 2700 : 15,

х = 180.