2/1x-28=50 4x+3/2=4/5 x-7/2x=28/15 3x-1.2=3.6 0.9x+1.3x=5.28

2/1x-28=50 2/1x=50+28=78x=78*2x=1564x+3/2=4/5 4x=4/5 -3/24x=-7/10x=-7/10/4x=-7/40x-7/2x=28/15 -5/2x=28/15 x=-28/15 *2/5x=56/753x-1.2=3.6 3x=3.6+1.23x=4.8x=4.8/3x=1.60.9x+1.3x=5.282.2x=5.28x=5.28/2.2x=...