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Maths Puzzle
Numerical Ability
I need HELP!
1. 6 = 2y - y + 4 4. 3(7 - 11) = y - 5
2. 4 - 9 = a - 1 + 14
3. -23 + 8 + x = -2 + 13
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book Other Question
a nurse has 1 liter of solution that is 20% alcohol. How much pure alcohol must she add to bring the solution up to a 25% concentration?
find the value of x in the equation. 2 radical sign x + 20= 15+3 radical sign x