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1) 0,4(Х -3) +2,5 = 0,5(4 + Х)</span>
<span />0,4Х - 1,2 + 2,5 =2 + 0,5Х
0,4Х - 0,5Х = 2 +1,2 - 2,5
-0,1Х = 0,7Х = -7
<span>2) <span>х-4/4=х+3/7</span></span>
<span><span>Х -4 =4Х +12/7</span></span>
<span><span>Х - 4Х = 12/7 +4</span></span>
<span><span>-3Х =5 5/7</span></span>
<span><span>Х = -13/7 = -1 4/7</span>
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