879-(458+h)=231 951-(r-354)=882 549-(425-b)=488 раскройте скобки 3(a+8) 8(6-y) (x-9)x11 12(5a-6) 7(5x+7y-6t) (2a+5b-3c)x14

879-(458+h)=231
879-458-h=231
-h=231-879+458
-h=-190
h=190

951-(r-354)=882
951-r+354=882
-r=882-951-354
-r=-423
r=423

549-(425-b)=488
549-425+b=488
b=488-549+425
b=364

раскройте скобки

3(a+8)=3a+24

8(6-y)=48-8y

(x-9)x11 =11x-99

12(5a-6)=60a-72

7(5x+7y-6t)=35x+49y-42t

(2a+5b-3c)x14=28a+70b-42c