Question

(5х+2х)*14=294

 

(12y-5y):4=21

 

(19х+6х):35=5

 

234:(21y-8y)=3

Answer 1

(5х+2х)*14=294

7x*14=294

7x=294:14

7x=21

x=21:7

x=3

 

(12y-5y):4=21

7y:4=21

7y=21*4

7y=84

y=84:7

y=12

 

(19х+6х):35=5

25x:35=5

25x=5*35

25x=175

x=175:25

x=7

 

234:(21y-8y)=3

234:13y=3

13y= 234:3 13y=78 y=78:3 y=26