Question

x-y=4 and 3x+2y=27 solve by substitution method​

Answer 1

x-y=4, x=4+y

3x+2y=27

3(4+y)+2y=27

12+3y+2y=27

5y=27-12

5y=15, y=3

returning to the first equation

x-3=4, x=4+3, x=7

(7;3)