Question

Решите срочно пожалуйста
1 (​х-2,5) × 4 1/5 = 6,3
2 3,5× ( х + 2 1/4) = 14

Answer 1

1)

$(x - 2.5) \times 4 \frac{1}{5} = 6.3$

$(x - 2.5) = 6.3 \div 4 \frac{1}{5}$

$x - 2.5 = 1.5$

$x = 1.5 + 2.5$

$x = 4$

Ответ :

$4$

2)

$3.5 \times (x + 2 \frac{1}{4} ) = 14$

$(x + 2 \frac{1}{4} ) = 14 \div 3.5$

$x + 2 \frac{1}{4} = 4$

$x = 4 - 2 \frac{1}{4}$

$x = 1 \frac{3}{4}$

Ответ :

$1 \frac{3}{4}$

Answer 2

Пример 1

$(x - 2.5) \times 4 \frac{1}{5} = 6.3$

$(x - 2.5) \times 4.2 = 6.3$

$x - 2.5 = 6.3 \div 4.2$

$x - 2.5 = 1.5 \\ x = 2.5 + 1.5 \\ x = 4$

Пример 2

$3.5 \times (x + 2 \frac{1}{4} ) = 14$

$x + 2.25 = 14 \div 3.5$

$x + 2.25 = 4 \\ x = 4 - 2.25$

$x = 1.75$