Question

3 To eliminate
ac from 3x+y = 7 and -x+2y=2
Second equation
multiplied by​

Answer 1

Answer

3x+y=7 -x+2y=2 2x-y= 5

Answer 2

x=2

y=2

Step-by-step explanation:

3×x+y=7

-x+2×y=2

x+y=7-3

x+y=4 -(1)

-x+y= -2+2

-x+y=0 -(2)

from (1) and (2)

-x+y=4

x+y=0

2y=4

y=2/4

y=

put y in equation number 1

x+y=4

x+2=4

x=4-2

x=2