Question

solve the equation by substitution method x-y=1 ;
3x-2y=12
​

Answer 1

Step-by-step explanation:

eq i

x-y = 1

=) x = 1 + y

eq ii

3x - 2y = 12

=) 3(1 + y) - 2y = 12

=) 3 + 3y - 2y = 12

=) y = 12 - 3

=) y = 9