(7+□):8=2 (19+□):9=3 (□□-4):7=8 (42-□□)*5=30 54:(□□-7)=9 (□□-30)*6=54

Question

(7+□):8=2 (19+□):9=3 (□□-4):7=8 (42-□□)*5=30 54:(□□-7)=9 (□□-30)*6=54

Answer 1

(7+9):8=2
(19+7):9=3
(60-4):7=8
(42-36)×5=30
54:(13-7)=9
(39-30)×6=54