$3x + 2y = 12,\ x + y = 5$. $x$ equals

$3x + 2y = 12,\ x + y = 5$. $x$ equals
  1. $2$
  2. $3$
  3. $4$
  4. $1$

Solution

Multiply 2nd by $2$: $2x + 2y = 10$. Subtract from first: $x = 2$.

Asked in: MH-SSC-9

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