exam
Maths Puzzle
Numerical Ability
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Solve the system of equations using the Addition method.
2a + 3b = -1
3a + 5b = -2
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exam Other Question
classify 3y=4x-1 as inconsistent, dependent, or independent
x=4/3y
One grade of oil has 0.50% of an additive, and a higher grade has 0.75% of the additive. How many liters of each must be used to have 1000 L of a mixture with 0.65% of the additive.