0,5x - 2 = - 2/9x + 1/2
1/2x + 2/9x = 1/2 + 2
( 9x + 4x ) / 18 = 5/2
13x = 5/2 * 18
13x = 45
x = 3 6/13
y = 0,5*( 45/13 ) - 2 = 45/26 - 2 = 1 19/26 - 2 = - 7/26
ОТВЕТ ( 3 6/13 ; - 7/26 )
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- 3/4x + 0,2 = 2,6x - 3/5
- 0,75x + 0,2 = 2,6x - 0,6
2,6x + 0,75x = 0,2 + 0,6
3,35x = 0,8
x = 4/5 : 67/20 = 80/335 = 16/67
y = - 3/4*( 16/67 ) + 0,2 = - 48/268 + 0,2 = -12/67 +1/5 = - 60/335 + 67/335 =
= 7/335
Ответ ( 16/67 ; 7/335 )