75. Решите уравнение:

Решение уравнений задания 75: **Столбец 1:** - $x \cdot 2 = 12 \Rightarrow x = 12 : 2 \Rightarrow x = 6$ - $x \cdot 7 = 42 \Rightarrow x = 42 : 7 \Rightarrow x = 6$ - $8 \cdot x = 56 \Rightarrow x = 56 : 8 \Rightarrow x = 7$ - $12 \cdot x = 60 \Rightarrow x = 60 : 12 \Rightarrow x = 5$ - $15 \cdot x = 45 \Rightarrow x = 45 : 15 \Rightarrow x = 3$ - $15 : x = 3 \Rightarrow x = 15 : 3 \Rightarrow x = 5$ - $45 : x = 3 \Rightarrow x = 45 : 3 \Rightarrow x = 15$ - $x : 48 = 5 \Rightarrow x = 5 \cdot 48 \Rightarrow x = 240$ - $x : 37 = 10 \Rightarrow x = 10 \cdot 37 \Rightarrow x = 370$ - $0 \cdot x = 0 \Rightarrow x$ любое число **Столбец 2:** - $2(x + 5) = 12 \Rightarrow x + 5 = 6 \Rightarrow x = 1$ - $84 : (x - 3) = 42 \Rightarrow x - 3 = 2 \Rightarrow x = 5$ - $3(x + 4) = 33 \Rightarrow x + 4 = 11 \Rightarrow x = 7$ - $45 : (x - 5) = 15 \Rightarrow x - 5 = 3 \Rightarrow x = 8$ - $4(x - 7) = 12 \Rightarrow x - 7 = 3 \Rightarrow x = 10$ - $6(x - 2) = 24 \Rightarrow x - 2 = 4 \Rightarrow x = 6$ - $(x + 3) \cdot 3 = 27 \Rightarrow x + 3 = 9 \Rightarrow x = 6$ - $(x - 4) : 5 = 7 \Rightarrow x - 4 = 35 \Rightarrow x = 39$ - $(x - 3) : 2 = 12 \Rightarrow x - 3 = 24 \Rightarrow x = 27$ - $(x - 9) \cdot 3 = 12 \Rightarrow x - 9 = 4 \Rightarrow x = 13$ **Столбец 3:** - $3(x + 4) = 18 \Rightarrow x + 4 = 6 \Rightarrow x = 2$ - $2(x - 7) = 18 \Rightarrow x - 7 = 9 \Rightarrow x = 16$ - $2(x + 5) = 30 \Rightarrow x + 5 = 15 \Rightarrow x = 10$ - $4(x - 6) = 64 \Rightarrow x - 6 = 16 \Rightarrow x = 22$ - $6(x + 3) = 96 \Rightarrow x + 3 = 16 \Rightarrow x = 13$ - $7(x + 4) = 63 \Rightarrow x + 4 = 9 \Rightarrow x = 5$ - $(x + 5) : 3 = 15 \Rightarrow x + 5 = 45 \Rightarrow x = 40$ - $(x - 3) : 4 = 48 \Rightarrow x - 3 = 192 \Rightarrow x = 195$ - $(x - 6) : 3 = 63 \Rightarrow x - 6 = 189 \Rightarrow x = 195$ - $(x + 8) : 2 = 42 \Rightarrow x + 8 = 84 \Rightarrow x = 76$