2021 · Q93
The values of x and y from the equations x − y = 6 and x/3 + y/2 = 12 are:
Elementary MathematicsAlgebra
- Ax = 6, y = 10
- Bx = 18, y = 12
- Cx = 4, y = 5
- Dx = 6, y = 14
Explanation
From the first equation, x = y + 6. Substituting into the second: (y+6)/3 + y/2 = 12, i.e. 2y + 12 + 3y = 72. So 5y = 60, giving y = 12 and x = 18. Hence option B.