Question

25y-9y+78=350 

 

208 :(91-a)=4

 

Упростить

14-7t+13=

x-10+11x=

9k+8-k=

17z+n-5z+n

6t+t+3-t=

z-11-88=

7z+6m-n-m=

 

Answer 1

25y-9y+78=350 

16y=272

y=17

 

208 :(91-a)=4

208=(91-a)*4

208=364-4a

156=4a

a=39

 

14-7t+13=27-7

x-10+11x=12x-10

9k+8-k=8k+8

17z+n-5z+n=2n+12z

6t+t+3-t=6t+3

z-11-88=z-99

7z+6m-n-m=5m-n+7z