exam Maths Puzzle Numerical Ability

Solve for X, Y, and Z in the following equation



c. 22X + 5Y + 7Z = 12

10X + 3Y + 2Z = 5

9X + 2Y + 12Z = 14

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exam Other Question
What is the inequality of {{{ 10-2p>12 and 7p<4p+9 }}} x2+7x+10=0 I guess