Question

12-7 21/29+Х+4 23/29=12 2/29

Answer 1

12-7 21/29+х+4 23/29=12 2/29

11 29/29-7 21/29+х=12 2/29-4 23/29

4 8/29+х=11 31/29-4 23/29

х=7 8/29-4 8/29

х=3

Answer 2

12-7 21//29+x+4 23//29=12 2//29
124//29+x+139//29-12 2//29=0
263//29+x-350//29=0
-3+x=0

x=3

// - черта дроби