Question

tìm số nguyên x biết : |x+2| +|2x+1| +|x+2|-5x=0

Answer 1

=x*3+(20+2+1)=5x

=x*3+23=5x

=x*3+23=50+x

=x*3-x+23=50

=x*2+23=50

=x*2=50-23

=x*2=27

x=27/2

x=13.5

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