exam
Maths Puzzle
Numerical Ability
How many gallons of an 80% alcohol solution must be mixed with 30 gallons of a 22% solution to obtain a solution that is 70% alcohol?
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exam Other Question
how is using one ,two or three variables to equations different from each other and how are they the same?
Solve by the elimination method
2x+3y=2
4x+6y=4