Question

a+b=300,b=c×9,c=d+13,d=e÷6,e÷6=19

Answer 1

d = e : 6

e : 6 = 19 } => d = 19

c = d + 13

d = 19        } => c = 32

b = c x 9

c = 32       } => b = 288

a + b = 300

b = 288     } => a = 12

Answer 2

e : 6 = 19

e = 19 × 6

e = 114

d = e : 6

d = 114 : 6

d = 19

c = d + 13

c = 19 + 13

c = 32

b = c × 9

b = 32 × 9

b = 288

a + b = 300

a + 288 = 300

a = 300 - 288

a = 12