20 – 3(х+8) = 5х + 12
20-3(х+8)=5х+12 20-3х-24=5х+12 -3х-5х=12-20+24 -8х=16 х=-2
20-3(x+8)=5x+12. 20-3x-24=5x+12 -3x-5x=12-20+24 -8x=16|:(-8) x=-2