exam Maths Puzzle Numerical Ability

How do I solve this equation? -3x+b=6x,for x

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exam Other Question

Add or subtract the fractions then simplify using the Pythagorean identities and factoring to find the expression that completes the identity.

sinx/(cosx+1) + (cosx+1)/sin x

Please show me the steps. Thank you! FIND THE QUOTIENTS;
1 364.19/10
2 479.23/100