Question

I solve by elimination method
x+y=5
x-y=7​

Answer 1

Answer:

x+y=5 ...eq 1

x-y=7 ...eq 2

ADDING EQ 1 AND 2

x+y=5

+ x-y=7

________

2x= 12

x=12/2

x = 6

SUBSTITUTING x in eq 1

x+ y = 5

6+y = 5

y = 5 - 6

y = - 1