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22-09-2018
Mathematics

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0.75x-0.5x=-3 solve and check the solution

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22-09-2018

[tex]0.75x-0.5x=-3\\\\(0.75-0.50)x=-3\\\\0.25x=-3\ \ \ \ \ \ |\text{multiply both sides by 4}\\\\4\cdot0.25x=(4)(-3)\\\\1x=-12\to\boxed{x=-12}\\\\check:\\\\L=(0.75)(-12)-(0.5)(-12)=-9+6=-3=R\\\\CORRECT[/tex]

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