Question

найдите х в пропорции 2,7/9=1 1/5/3x+1

Answer 1

2,7 * ( 3x + 1) = 9 * 1 1/5

8,1x + 2,7 = 10,8

8,1x = 10,8 - 2,7

8,1x = 8,1

x = 1

Answer 2

2.7(3х+1)=9*1 1/5

2.7(3х+1)=9*1.2

2.7(3х+1)=10.8

3х+1=10.8:2.7

3х+1=4

3х=4-1

3х=3

х=3:3

х=1