Question

Solve for x.
- 3x + 8y = 5
6x - 2y =10

Answer 1

given -3x + 8y = 5 ------------ (1)
         6x - 2y = 10 ---------- (2)
(1) × 2 ⇒ -6x + 16y = 10
(2)      ⇒     6x - 2y = 10
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                 14y = 20
                     y = 20/14
                     y = 10/7
sub y = 10/7 in (1)
-3x + 8(10/7) = 5
  -3x + 80/7 = 5
  -3x = 5- 80/7
   -3x = 35 - 80/7
-3x = -45/7
 x =-45/21
x = -45/21  y= 10/7