Question

х-9=2х-7
4х-15=25+3х
16-х=х-20
105-6х=4х-35
10х+1=12х-17
$\frac{3x + 2}{2x - 1} = \frac{3}{5}$
$\frac{4}{2y - 5} = \frac{5}{y + 7}$
$\frac{8}{2x + 3} = \frac{3}{4}$
решите уравнение
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Answer 1

Ответ:

$1)x - 9 = 2x - 7 \\ x - 2x = - 7 + 9 \\ - x = 2 \\ x = - 2 \\ 2)4x - 15 = 25 + 3x \\ 4x - 3x = 25 + 15 \\ x = 40 \\ 3)16 - x = 20 \\ - x = 20 - 16 \\ - x = 4 \\ x = - 4 \\ 4)105 - 6x = 4x - 35 \\ - 6x - 4x = - 35 - 105 \\ - 10x = - 140 \\ x = 14 \\ 5)10x + 1 = 12x - 17 \\ 10x - 12x = - 17 - 1 \\ - 2x = - 18 \\ x = 9 \\ - - - - - - - - - - -$