Question

Помогите. х-12=75:3. 45-х=11+7. х+39=786*4. 89+Х=678956-87

Answer 1

х-12=75:3
х-12=25
x=37

45-х=11+7
45-х=18
x=27

х+39=786*4
х+39=3144
x=3105

89+x=678956-87
89+x=678869
x=678780

Answer 2

Решение:

x - 12 = 75 ÷ 3

x - 12 = 25

x = 25 + 12

x = 37

45 - x = 11 + 7

45 - x = 18

-x = 18 - 45

-x = -27

x = 27

x + 39 = 786 * 4

x + 39 = 3144

x = 3144 - 39

x = 3105

89 + x = 678956 - 87

x = 678956 - 87 - 89

x = 678780

Ответ:

x₁ = 37

x₂ = 27

x₃ = 3105

x₄ = 678780