Question

a=b+40-75
a=b-35

b-35+b=195
2b=195-35
2b=160
b=80

a+80=195
a=195-80
a=115

Answer 1

a=b+40−75
b−35=a
b−35+35=a+35
b=a+35

b−35+b=195
b+−35+b=195
(b+b)+(−35)=1952b+−35=195
2b−35=195
2b−35+35=195+35
2b=230
$\frac{2b}{2} = \frac{230}{2}$
b=115

a+80=195
a+80−80=195−80
a=115