1) x=320-176
x=144
2)Y=501-294=207
Y=207
3)a=453+219
a=672
4)y+383=479-33
y+383=446
y=446-383=63 y=63
1) 320-×=176
-×= 176-320
-×= -144
×=144
2) y+294=501
y=501-294
y= 207
3) a-453=219
a=219+453
4) (y+383)-479=33
y-96=33
