Question

(12y-5y)/4=21. (19х+6х)/35=5. 234/(21y-8y)=3

Answer 1

7y=84

y=12

 

25x=5*35

x=7

234=3*13y 

y=6 

Answer 2

(12у-5у)/4=21

7у=21*4

у=84:7

у=12

(19х+6х)/35=5

25х=5*35

х=175:25

х=7

234/(21у-8у)=3

234:3=13у

78:13=у

у=6