exam
Maths Puzzle
Numerical Ability
2a 4a
____ - ____
a+1 a2-1
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exam Other Question
What amount of each mixture, one 95% alcohol and the other 15% alcohol, must be used to make 10 liters of a mixture which is 45% alcohol? What equations will express this problem?
5(3x - 6) - 8(3x - 7)
How do i simplify this??