Question

Srochnoooooo0oooooo​

Answer 1

Ответ:

1)

2/3=x+1/7.5

x+1=7.5*2/3=15/3

x+1=5

x=4

2)7x+3/10=3/4

7x=3/4-3/10

7x=30/40-12/40

7x=18/40

x=18/40*1/7

x=18/280

x=9/140