Реши уравнение (640:у).9 -27 =45

Question

Реши уравнение (640:у).9 -27 =45

Answer 1

(640:y)*9=45+27
(640:y)*9=72
640:y=72:9
640:y=8
y=640:8
y=80

Answer 2

(640:y)*9-27=45
(640:y)*9=45+27
(640:y)*9=72
640:y=72:9
640:y=8
y=640:8
y=80
_______________
(640:y)*9-27=45

Comments

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