Ответы на вопрос:
1) a) -(7 - 3y) = 8 - 8(2 - y) -7 + 3y = 8 - 16 + 8y 8y - 3y = 16 - 8 - 7 5y = 1 y = 1/5 или 0.5 б) -5(2 - 2x) = 2(x - 3) + 4 -10 + 10x = 2x - 6 + 4 10x - 2x = 10 - 6 + 4 8x = 8 x = 1 в) 2x - 4(x + 7) = 3(2 - x) 2x - 4x - 28 = 6 - 3x 2x - 4x + 3x = 28 + 6 x = 34 2) a)1.26x + 3.58 = 1.74x + 6.46 1.74x - 1.26x = 3.58 - 6.46 0.58x = -3.12 x = -3.12/0.58 x = -6 б)0.8 - (5.12 + 0.08y) = 4.92y - y 0.8 - 5.12 - 0.08y = 3.92y 0.8 - 5.12 = 3.92y + 0.08y 4y = -4.32 y = -4.32/4 y = -1.08
Популярно: Математика
-
nastya273003.09.2022 07:13
-
Nkpr19.10.2022 03:02
-
VasyaPumpkin01.09.2022 17:41
-
SashaV200329.07.2022 11:42
-
looolll2k1705.05.2021 23:49
-
Rzaevat01.06.2020 11:47
-
EnemySSS13.12.2021 21:59
-
rudnevskaya2004124.03.2023 13:43
-
Доминика67155408.01.2020 23:31
-
rclpsss28.04.2023 17:07