exam Maths Puzzle Numerical Ability

is 0 a solution of 4-3b=4-5b

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exam Other Question

find the length x in the triangle

the top is 10 the bottom is 8 and the right side is x
express it in simplified radical form What are the roots of sqrt2x(x+3)=4(x+3)??? Can someone PLEASE help me with thsi one??? I think the answer is {-3,-sqrt2/2} BUT I am not sure :(