Question

X+y=10 x-y=12 indetify substitution method​

Answer 1

Answer:

x+y=10.....1

x-y=12.....2

from.....1

x=10-y....3

substitute equation 3 in 2

10-y-y=12

10-2y=12

-2y=12-10

-2y=2

y=-1

x=11