Ответ:
1) 29x-3x-4x+42=(29-3-4)×X+42= 22X+42
2) 13x+12x+3x-13= (13+12+3)×X= 28X-13
3) 2(a+2b+3)+ 4(3a+2b+5) = 2a+4b+6+12a+8b+20=
=14a+12b+26
4) a+14+5a+16=6a+30
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Ответ:
1) 29x-3x-4x+42=(29-3-4)×X+42= 22X+42
2) 13x+12x+3x-13= (13+12+3)×X= 28X-13
3) 2(a+2b+3)+ 4(3a+2b+5) = 2a+4b+6+12a+8b+20=
=14a+12b+26
4) a+14+5a+16=6a+30
1)22x+42
2) 28x-13
3)14a+12b+26
4)6a+30