Question

Розв'яжи рівняння: 1) x + 10,8 = 12,51; 2) x 4,3 = 2,83; 3) 5,2 - x = 3,9; 4) 7,13 + x = 8.​

Answer 1

Ответ:

$x = 12.51 - 10.8 \\ x = 1.71 \\ x4.3 = 2.83 \\ x = 2.83 \div 4.3 \\ x = \frac{283}{100} \div \frac{43}{10 } \\ x = \frac{283}{100} \times \frac{10}{43} \\ x = \frac{283}{430}$

$5.2 - x = 3.9 \\ x = 5.2 - 3.9 \\ x = 1.3 \\ 7.13 + x = 8 \\ x = 8 - 7.13 = 0.87$