Упростите выражения:
a)(5b-8)+(4-b)=
(7a+14)-(2-5a)=
(5b-8)+(4-b)=5b-8+4-b=4b-4
(7a+14)-(2-5a)=7a+14-2+5a=12a+12
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(5b-8)+(4-b)=5b-8+4-b=4b-4
(7a+14)-(2-5a)=7a+14-2+5a=12a+12