1)6x-38x-x=-31x
5a-18-12a+34=-7a+16
1,4c-7,2b-3,8b+2,6c=-11b+4c
2)a+(b+c-d-p)=a+b+c-d-p
a-(b+c-d-p)=a-b-c+d+p
2m-(n+m)+(m+n)=2m-n-m+m+n=2m
2,5p-(6+8p)=2,5p-6-8p=-5,5p-5
3)4(5-3x)+9x-7=20-12x+9x-7=13-3x
7x(2t+5)-23t-11=14xt+35x-23t-11
-3(0,7+1,4)+4,8-7,1p=-2,1-4,2+4,8-7,1p=-1,5-7,1p
5(6,1-4,2a)+6,3a-4,7=30,5-21a+6,3a-4,7=25,8-14,7a