If 9x-3y=12 and 3x-5y=7 then 6x-2y = ?

A.-5
B. 4
C. 2
D. 8

• option D
  9x-3y=12---1
  3x-5y=7----2
  multiplying second equation with 3 and solving the two equations we get
  x=1 and y=-1
  6*1-2*-1=8
• 12 years agoHelpfull: Yes(2) No(0)
• 9x-3y=12---1
  3x-5y=7----2
  multiplying second equation with 3 and solving the two equations we get
  9x-3y=12
  9x-15y=21
  ---------- subtract then
  y=-9/12
  then substitute in 1st eqn we get
  x=39/36then
  6x-2y=6(39/36)+2(9/12)=>8
  
• 10 years agoHelpfull: Yes(0) No(0)