sofiyaleb3
sofiyaleb3
13-05-2018
Mathematics
contestada
With a quick explanation please
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gmany
gmany
13-05-2018
[tex]\dfrac{40}{5x-2}=\dfrac{55}{6x+6}\ \ \ |\text{cross multiply}\\\\40(6x+6)=55(5x-2)\\\\240x+240=275x-110\ \ \ |-240\\\\240x=275x-350\ \ \ \ |-275x\\\\-35x=-350\ \ \ \ \ |:(-35)\\\\\boxed{x=10}[/tex]
Look at the picture.
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