X+78=3x-2 ..................

Mathematics

1 answer:

photoshop1234 [79]3 years ago

6 0

Answer:

$x=40$

Step-by-step explanation:

$x+78=3x-2\\\mathrm{Subtract\:}78\mathrm{\:from\:both\:sides}\\x+78-78=3x-2-78\\x=3x-80\\\mathrm{Subtract\:}3x\mathrm{\:from\:both\:sides}\\x-3x=3x-80-3x\\\\$

$-2x=-80\\\frac{-2x}{-2}=\frac{-80}{-2}\\x=40$

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