1.a-95=47 2.49=z+16 3.29+y=55 4.72=80-x

1. a-95=47
a=47+95
a=142

2. 49=z+16
49-16=z
33=z

3. 29+y=55
y=55-29
y=26

4. 72=80-x
72-80=-x
-8=-x
8=x