exam Maths Puzzle Numerical Ability

To solve the rational equation below, which step would result?
3/x+1/2= 8/(x+2)

I got: 3(x+2) + .5 = 8X

Is this correct?
Thanks~

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exam Other Question

Graph this equation.

2x+y=5 The height, in feet, of a rock,above the Colorado River that is thrown from the north rim of the Grand Canyon is given by Height = 5700 - 16t^2, where t is the number of seconds after the rock above the river 5 seconds after it is released.