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

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asked Aug 19, 2021 145k views

1 vote

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

Mathematics
middle-school

Sudhishkr asked

by Sudhishkr

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1 Answer

1 vote

Answer:

x=40

Explanation:

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

$-2x=-80\\(-2x)/(-2)=(-80)/(-2)\\x=40$

Erikas Pliauksta answered Aug 23, 2021

by Erikas Pliauksta

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