№1022
1) 5a+3a-7a-2a=-a
2) -4b+5b-6b+3b=-2b
3) 2,8x+3,5x-1,8x-2,5x=2x
4) 19a-12b-7a+24b=12a+12b
№1023
1) 19a-12b-7a+24b=12a+12b
3) 7,5x-9,4y-3,5x+4,4y=4x-5y
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Answers & Comments
№1022
1) 5a+3a-7a-2a=-a
2) -4b+5b-6b+3b=-2b
3) 2,8x+3,5x-1,8x-2,5x=2x
4) 19a-12b-7a+24b=12a+12b
№1023
1) 19a-12b-7a+24b=12a+12b
3) 7,5x-9,4y-3,5x+4,4y=4x-5y