Объяснение:
2) 2x-7+4x-5x=2x+4x-5x-7=x-7
4)9-2x+4 1 2 a-3,5x+2,4a=9-5,5x+414,4a
3) - 7x + y - 8x - y=-15x
1) 5a + 4a - 7a=2a
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Объяснение:
2) 2x-7+4x-5x=2x+4x-5x-7=x-7
4)9-2x+4 1 2 a-3,5x+2,4a=9-5,5x+414,4a
3) - 7x + y - 8x - y=-15x
1) 5a + 4a - 7a=2a