Question

Решите уравнение.
Даю 64 балла ❤️❤️❤️❤️❤️❤️❤️❤️❤️❤️
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Answer 1

Ответ:

1)

3х/12+4/12=7

7х/12=7

7х=84

х=12

2)

5х/4-2х/4=3

3х/4=3

3х=12

х=4

Answer 2

$1)\frac{x}{4}+\frac{x}{3} =7\\\\\frac{x}{4}\cdot 12+\frac{x}{3}\cdot 12 =7\cdot 12\\\\3x+4x=84\\\\7x=84\\\\x=84:7\\\\\boxed{x=12}\\\\\\2)\frac{5x}{4}-\frac{x}{2} =\frac{3}{1}\\\\\frac{5x}{4}\cdot 4-\frac{x}{2} \cdot 4=\frac{3}{1}\cdot 4\\\\5x-2x=12\\\\3x=12\\\\x=12:3\\\\\boxed{x=4}$