Question

Решите уравнение:
2x+9=13-x
14-y=19-11y
0,5a+11=4-3a

Answer 1

2x+9=13-x
3x=13-9
3x=4
x= 4/3 (дробь)
.
14-y=19-11y
-y+11y=19-14
10y=5
y=1/2
.
0.5a+11=4-3a
0.5a+3a=4-11
3.5a=-7
a=-2

Answer 2

1) 2x + 9 = 13 - x,
2х + х = 13 - 9,
3х = 4,
х = 4/3,
х = 1 целая 1/3

2) 14 - y = 19 - 11y,
-у + 11у = 19 - 14,
10у = 5,
у = 0,5

3) 0,5a + 11 = 4 - 3a,
0,5а + 3а = 4 - 11,
3,5а = -7,
а = -2
Удачи))