Question

Решите уравнения
1) 11x - 7 = -22 + 5x
2) 2.8 - 3.2a = -4.8 - 5.1a
3) 0.893x - 6.54 = 0.894x - 3.78
4) 3 1/4x - 4 5/7 = 3 5/12x - 3 3/14
5) 5/12 - 7/9y = 10 5/12 - 3y
Желательно с решением
Заранее спасибо!

Answer 1

1)
11x - 7 = -22 + 5x
11x-5x=-22+7
6x=-15
x=-15:6
x=-2,5

2)
 2.8 - 3.2a = -4.8 - 5.1a
-3,2a+5,1a=-4,8-2,8
1,9a=-7,6
a=-7,6:1,9
a=-4

3)
0.893x - 6.54 = 0.894x - 3.78
0,894x-0,893x=3,78-6,54
0,001x=-2,76
x=-2,76:0,001
x=-2760

4)
3 1/4x - 4 5/7 = 3 5/12x - 3 3/14
3 1/4x - 3 5/12x = 4 5/7 - 3 3/14
3 3/12x - 3 5/12x = 4 10/14 - 3 3/14
-1/6x = 1 1/2
x = -3/2 * 6/1
x = -9

5)
5/12 - 7/9y = 10 5/12 - 3y
-7/9y + 3y = 10 5/12 - 5/12
2 2/9y = 10
y = 10*9/20
y = 4,5