Question

50a + 80b = 15000
Equation in two variables ​

Answer 1

substituting method:

50a + 80b = 15000

50a= 15000 - 80b

a = (15000 - 80b ) /50

we have got the value of a ,

than substituting the value of a in the equation,

50 (1500 - 80b) / 50 +80b = 15000

now,

solve it by simple mathematice or BODMAS rule