Ответ:
а) (13/28 - x)+17/28=23/28
13/28 - x=23/28-17/28
13/28 - x=6/28
-x=6/28-13/28
-x= -7/28
x=7/28
б) 43/47- (x-21/47)=25/47
- x+21/47=25/47-43/47
-x+21/47= -18/47
-x= -18/47-21/47
x= 39/47
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Verified answer
Ответ:
а) (13/28 - x)+17/28=23/28
13/28 - x=23/28-17/28
13/28 - x=6/28
-x=6/28-13/28
-x= -7/28
x=7/28
б) 43/47- (x-21/47)=25/47
- x+21/47=25/47-43/47
-x+21/47= -18/47
-x= -18/47-21/47
x= 39/47