ответ:
1) 10 - (7 - 4x-x) = x + 8x - 9
10-7+4х+х=х+8х-9
4х+х-х-8х= -9-10+7
-4х=-12
х= -12/ -4
х=3
2) (5x² – 3) - (2x + 5) = 5х²
5x² – 3 - (2x + 5) = 5х²
-3 - 2x - 5 = 0
-8 -2x=0
-2x=8
x=-4
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ответ:
1) 10 - (7 - 4x-x) = x + 8x - 9
10-7+4х+х=х+8х-9
4х+х-х-8х= -9-10+7
-4х=-12
х= -12/ -4
х=3
2) (5x² – 3) - (2x + 5) = 5х²
5x² – 3 - (2x + 5) = 5х²
-3 - 2x - 5 = 0
-8 -2x=0
-2x=8
x=-4