Question

21,5(4x-1)+8(12,5-9x)=82

Answer 1

21.5(4х-1)+8(12.5-9х)=82

86х-21.5+100-72х=82

86х-72х=82+21.5-100

14х=3.5

х=0.25

Answer 2

86Х-21,5+8(12,5-9х)-82=0
86Х-21,5+100-72х-82=0
86Х+78,5-72х-82=0
14Х+78,5-82=0
14Х-3,5=0
Х=3,5:14
Х=0,25