Question

решите первое уравнение, пожалуйста ❤​

Answer 1

3/4 * 1/x + 12/5 = 9/2
3/4x = 9/2 - 12/5
3/4x=21/10
30=84x
84x=30
x=5/14

Answer 2

Ответ:

3/4÷х+2 2/5=4 1/2

3/4÷х=4 5/10-2 4/10

3/4÷х=2 1/10

х= 3/4÷21/10=3/4×10/21=1/2×5/7

х=5/14

3/4÷5/14+2 2/5=4 1/2

9/2=4 1/2

4 1/2=4 1/2