Question

12x + 13x = 2000

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Answer 1

12.x + 13.x = 2000

(12 + 13) . x=2000

25 . x =2000

x =2000:25

x=80 

Answer 2

12x + 13x     = 2000

(12 + 13) . x  = 2000

    25 . x          = 2000

            x          = 2000 : 25

            x          = 80.

Answer 3

12x+13x=2000

=x(12+13)=2000

=x25=2000

=>x=2000/25

=>x=80