2.156-x+43=170-x=170-156-43-x=-29x=293.23-x-21=2-x=2-23+21x=04.5c-8=121÷11×25c-8=225c=22+85c=30c=30÷5c=65.821-m-268=349-m=349-821+268-m=-204m=2046.104,2-x=5,04÷1,2104,2-x=4,2-x=4,2-104,2-x=-100x=1007.5,7x=1,01+0,75,7x=1,71x=1,71÷5,7x=0,38.203,2-x=6,72÷2,1203,2-x=3,2-x=3,2-203,2-x=-200x=2009.5,1x=2,01+0,035,1x=2,04x=2,04÷5,1x=0,410.3,2x-28,6=1,904÷0,563,2x-28,6=3,43,2x=3,4+28,63,2x=32x=32÷3,2x=1011.0,52x=0,3-0,0920,52x=0,208x=0,208÷0,52x=0,412.2,3x-41,7=2,021÷0,472,3x-41,7=4,32,3x=4,3+41,72,3x=46x=46÷2,3x=2013.0,71x=0,5-0,0740,71x=0,426x=0,426÷0,71x=0,614.0,72x=0,04-0,065+0,00710,72x=-0,018x=-0,018÷0,72x=-0,02515.