Question

Добрий вечір! Допоможіть Тарасенкова вправа 1292, приклад 2! ДЯКУЮ!

Answer 1

1) х = 96,4 * (-7/8) + (-1/91) * (-7/8)
    х = 482/5 * (-7/8) + 1/13 * 1/8
    х = -241/5 * 7/4 + 1/104
    х = -1687/20 + 1/104
    х = -43 857/520 = $-84 \frac{177}{520}$
    -43 857/520 --- 100%
    х --- 20%
    х = -43 857 * 20 / 100 * 520 = -43857/2600
2) х = -10,5 * $2 \frac{2}{15}$ + (-5,4) * $3 \frac{7}{9}$ - $\frac{108}{285}$ * ($- \frac{19}{144}$)
    х = -21/2 * 32/15 + (-27/5) * 34/9 + 3/15 * 1/4
    х = -7 * 16/5 - 3/5 * 34 + 1/5 * 1/4
    х = -112/5 - 102/5 + 1/20
    х = -171/4 = $-42 \frac{3}{4}$
    -171/4 --- 100%
    х --- 20%
    х = -171 * 20 / 100 * 4 = -171/20 = $-8 \frac{11}{20}$
3) х = 1,8 * ($-4 \frac{2}{3}$) + $6 \frac{5}{6}$ * ($\frac{-6}{41}$)
    х = 9/5 * (-14/3) + 41/6 * (-6/41)
    х = -3/5 * 14 - 1
    х = 42/5 - 1
    х = -47/5 = $-9 \frac{2}{5}$ = -9,4
    -47/5 --- 100%
    х --- 20%
    х = -47 * 20 / 100 * 5 = -47/25 = $-1 \frac{22}{25}$