Toán Lớp 7: tìm x biết x-1/2018 + x-2/2017 = x-3/2016 + x-4/2015
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Toán Lớp 7: tìm x biết x-1/2018 + x-2/2017 = x-3/2016 + x-4/2015
Comments ( 1 )
Đáp án:
x-1/2018+x-2/2017=x-3/2016+x-4/2015
=x-1/2018+x-2/2017-x+3/2016+x+4/2015=0
=(x+x-x+x)+(-1/2018-2/2017+3/2016+4/2015=0
=2x+2×10^-3=0
X=-1×10^-3