exam Maths Puzzle Numerical Ability

solve and graph
2divided by 3z-4less than or equal to -2

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one number is equal to two times a second number. two time the first number plus two times the second number is 24. if you let x stand for the first number and y for the second, what are the two number. i need your help to solve this here it is

the attendance at a baseball game was 400 people. student tickets cost $2 and adult tickets cost $3.total ticket sales were $1050. how many tickets of each type were sold