exam Maths Puzzle Numerical Ability

Please help me.
A certain amount of 8% solution must be added to another amount of a 5% salt solution to produce a total of 36 ounces of a 6% solution. How many ounces of each solution is needed?

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exam Other Question
Please someone help me with this question. I have a serious brain cramp

__5y____ + __4b_______
axy^2 bx^2y I need help with 2 problems.

1.Solve the equation (5-2x)^2=25 by using the Square Root Property:

2. Solve: 6/x+1 + 2 = 3/x