1. Пропорция 470 - 100% = x - 30% 2. Уравнение 12:2 1/4 = 12/1* 4/9 = 48/9 =5 3/9 2x -...

Question

1. Пропорция
470 - 100% = x - 30%
2. Уравнение
12:2 1/4 = 12/1* 4/9 = 48/9 =5 3/9
2x - (3x-1)*2=10 - (6x-8)

Answer 1

470-100%
x-30%
x=470*30/100=141



2x - (3x-1)*2=10 - (6x-8)
2x-6x+2=10-6x+8
2x-6x+6x=10+8-2
2x=16
x=16:2
x=8