Zad.1
19/27×(0,4+1,6÷⅔)÷(-3/2)³=19/27×(0,4+2,4)÷(-27/8)=19/27×2,8×(-8/27)=19/27×9/5×(-8/27)=
(-152/405)
Zad.2
(x+1)/5+(x-1)/3=2
(3x+3)/15+(5x-5)/15=2 /×15
3x+3+5x-5=30
8x-2=30 /+2
8x=32 / ÷8
x=4
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Zad.1
19/27×(0,4+1,6÷⅔)÷(-3/2)³=19/27×(0,4+2,4)÷(-27/8)=19/27×2,8×(-8/27)=19/27×9/5×(-8/27)=
(-152/405)
Zad.2
(x+1)/5+(x-1)/3=2
(3x+3)/15+(5x-5)/15=2 /×15
3x+3+5x-5=30
8x-2=30 /+2
8x=32 / ÷8
x=4