( 2x + 3,5 ) / 10x = ( ( 3/5 ) + ( 1/2 )) / 2
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x ≠ 0
3/5 + 1/2 = 6/10 + 5/10 = 11/10
11/10 : 2 = 11/20 = 0,55
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( 2x + 3,5 ) / 10x = 0,55
2x + 3,5 = 0,55 * 10x
2x - 5,5x = - 3,5
- 3,5x = - 3,5
x = 1
ОТВЕТ 1