Question

13-25 Решите ПЖ СРОЧНО

Answer 1

$13) frac{1}{3}d-4c- frac{1}{9}d +12c= 8c+ frac{3}{9}d- frac{1}{9}d=8c+ frac{2}{9}d$
$14) -5k-1,3m+7k+0,7m=2k-0,6m$
$15) 5a-6a-7b+b=-a-6b$
$16) 4a+5b-6a+4b+10=9b-2a+10$
$17) 6x-7+8y-3+4y=6x-10+12y$
$18)(4x+3)+(7-4y)=4x+3+7-4y=4x-4y+10$
$19) 2(2a+3b)-3a=4a+6b-3a=a+6b$
$20) 3b-3(a-5b)=3b-3a+15b=18b-3a$
$21) 5(a+2)-9+4a=5a+10-9+4a=9a+1$
$22) -3(z+4)+2(z-3)=-3z-12+2z-6=-z-18$
$23) 3(x+y)-1,7(x-y)=3x+3y-1,7x+1,7y=1,3x+4,7y$
$24) 1 frac{1}{3}(2a-4b)+ frac{1}{3}(6b-3a)= frac{8a}{3}- frac{16b}{3}+ frac{6b}{3}- frac{3a}{3}= frac{5a}{3}- frac{10b}{3} =1 frac{2}{3}a$$-3 frac{1}{3}b$
$25) 2 frac{1}{2} (2a-6b)- frac{1}{4} (8b+4a)= frac{10a}{2}- frac{30b}{2}- frac{8b}{4}- frac{4a}{4}=5a-15b-2b-a$$=4a-17b$