当x= ( )时,2x-1/3与3x+1/7互为相反数?当x= 时,2x-1/3【三分之二X减一】与3x+1/7【七分之三X加一】互为相反数.
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当x= ( )时,2x-1/3与3x+1/7互为相反数?当x= 时,2x-1/3【三分之二X减一】与3x+1/7【七分之三X加一】互为相反数.
当x= ( )时,2x-1/3与3x+1/7互为相反数?
当x= 时,2x-1/3【三分之二X减一】与3x+1/7【七分之三X加一】互为相反数.
当x= ( )时,2x-1/3与3x+1/7互为相反数?当x= 时,2x-1/3【三分之二X减一】与3x+1/7【七分之三X加一】互为相反数.
互为相反数就是和为零.
(2x-1)/3+(3x+1)/7=【7(2x-1)+ 3(3x+1)】/21=0
就是7(2x-1)+ 3(3x+1)=0
就是14x-7+9x+3=23x-4=0
就是x=4/23
互为相反数和为0