exam Maths Puzzle Numerical Ability

Can u please help me solve for the variable

[2 -5] [8 -20]
x [7 y] = [z 24]

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exam Other Question

Casella's Catering is planning a wedding reception. The bride and groom would like to serve a nut mixture containing 25% peanuts. Casella has available mixtures that are either 40 you sold tickets to the school play. advanced tickets were $4. tickets bought at the door were $5. total ticket sales were $400. let x represent the number of advanced tickets sold