Multiple choice general knowledge math & puzzles

Solve the two equaions 4x+6y=12 2x+8y=10 then values of x and y respectively

  1. 1.6 and 1.2

  2. 0.8 and 1.8

  3. 1.8 and 0.8

  4. 1.2 and 1.6

Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Multiplying the second equation by 2: 4x + 16y = 20. Subtracting the first (4x + 6y = 12) gives 10y = 8, so y = 0.8. Substituting y into 2x + 8(0.8) = 10 gives 2x + 6.4 = 10, 2x = 3.6, x = 1.8.