exam Maths Puzzle Numerical Ability

Could you please help me solve the following problem and please show me the steps on how to solve it? Thank you so much - I greatly appreciate the help that you provide!
The problem is:
-[3x-(2x + 5)] = -4-[3(2x-4)-3x]

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exam Other Question

x/2+x/4=5 Peter is growing two strains of yeast in the labratory. Strain A originally had 80 cells and is known to quadruple every 2 hours. Strain B initially had 640 cells and doubles every