А) 37,5 -(62,01 -15,7) + (-37,5 +62,01 -30,3) = 37,5-62,01 +15,7 -37,5 +62,01 +30,3 = 15,7 +30,3 =46,0
б) (7 4/21 - 3 9/21 ) - (1 5/28 - 3 10/21) = 3 16/21 - ( 1 15/84 - 3 40/84) =
3 16/21 - ( - 2 25/84) = 3 16/21 + 2 25/84 = 3 64/84 + 2 25/84 = 5 89/84 = 6 5/84
6\х\=4,2
\х\=0,7
х=0,7 х=-0,7
1) 3/7+4/7=1
2) 1/10+2/10+7/10=1
3) 1/3+4/6=1
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a)
x-7/8=5/12
x=7/8+5/12
x=21/24+10/24
x=31/24
x=1 7/24
б)
х+11/42=5/14
х=15/42-11/42
х=4/42
х=2/21
7/9х+11/12=13/18
28<span><span>/36х+33/35=26/36</span></span>
<span><span>28х+33=26</span></span>
<span><span>28х=26-33</span></span>
<span><span>28х=-7</span></span>
<span><span>х=-1/4</span>
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