exam Maths Puzzle Numerical Ability

Five Proteen Bars and 7 Superdrinks total 1915 calories. Four Proteen Bars and 3 Superdrinks total 1155 calories. How many calories does one Proteen Bar have? One Superdrink?

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exam Other Question
Solve the system by graphing.

x - 2y = 8
x + y = -1 Can someone help me with this equation below??

-0.52z = -0.13