Question 1001648
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This is not quadratic (quadratic has exponent 2):
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{{{(x/2)+(x/5)=1}}} . Multiply by 2.
{{{x+(2x/5)=2}}} . Multiply by 5.
{{{5x+2x=10}}}
{{{7x=10}}} . Divide by 7.
{{{x=10/7}}}
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If this was not your equation, please re-post with parentheses to clarify. 
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