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

2x-(3x-1)×2=10-(6x-8);
2x-3x+1×2=10-6x+8;
2x-3x+6x=-1+10+8×2;
5x=34;
x=6.8