<span>а) 45,7х+0,3-2,4=89,6</span><span>45,7х=89,6-0,3+2,4</span><span>х=2,007</span><span>б) 80,1у-10,1у+4,7=81,7</span><span>70у+4,7=81,7</span><span>70у=77</span><span>у=1,1</span>