12. Упростите выражение и найдите его значение:
1) 2(x+7)+4x при x=5
2)9(3-y)+15 при y=2
3)1,5(y+9)+3,5 при x =8
4)3/4(x-6)+2 при x 8
ПОМОГИТЕ 5 КЛАСС ​
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