Question

a+25=35
c=a+b
b=a+4
a+b+c-d=3

Answer 1

35-25=10 a
10+4=14 b
10+14=24 c
10+
14
24=48 a+b+c
48-3=45 d

v. 10+14+24=48-45=3

Answer 2

a+25=35=>a=35-25
a=10
b=a+4 <=> b=10+4
b=14
c=a+b=> c=10+14
c=24
10+14+24-d=3
24+24-d=3
48-d=3
d=48-3
d=45