Решите уравнения:
1)0,5-0,3х=0,2х-2
2)12х-19=-х-34
3)3(х-2)=х+15
4)0,9-0,4х=0,2х-1,5х
5)14-6х=25+х
6)4(х-1)=6х-17
Ответы
Ответ:11х = 36 - х11х + х = 3612х = 36х = 36 : 12х = 3№ 27 - 2х = 3х - 187 - 2х - 3х = - 187 - 5х = - 185х = 7 - (- 18)5х = 7 + 185х = 25х = 25 : 5х = 5№ 30,4х + 3,8 = 2,6 - 0,8х0,4х + 0,8х = 2,6 - 3,81,2х = - 1,2х = - 1,2 : 1,2х = - 1№ 43/8х + 15 = 1/6х + 103/8х - 1/6х = 10 - 159/24х - 4/24х = - 55/24х = - 5х = - 5 : 5/24х = - 24№ 5- 6(2х + 1) = - 42 - 3х- 12х - 6 = - 42 - 3х- 12х + 3х = - 42 + 6-9х = - 36х = - 36 : (- 9)х = 4№ 63(х - 7) - 6(2х + 5) = 2(3х - 1) + 113х - 21 - 12х - 30 = 6х - 2 + 11-9х - 51 = 6х + 9- 9х - 6х = 9 + 51- 15х = 60х = 60 : (- 15)х = - 4№ 73/5 * (7/9х - 1/3) = х - 2 1/37/15х - 1/5 = х - 2 1/37/15х - х = - 2 1/3 + 1/57/15х - 15/15х = 1/5 - 2 1/3- 8/15х = 1/5 - 7/3- 8/15х = 3/15 - 35/15- 8/15х = - 32/15х = - 32/15 : (- 8/15)х = - 32/15 * (- 15/8)х = 4№ 88 * (5 - 3х) = 6 * (2 - 4х) + 7−8 (−3x + 5) + 6 (−4x + 2) + 7 = 0Нет решений№ 9 3 5-------- = ----------2х - 1 3х - 23 * (3х - 2) = 5 * (2х - 1)9х - 6 = 10х - 59х - 10х = - 5 + 6-х = 1х = - 1№ 105ах = 14 - х5а*4 = 14 - 420а = 10а = 10 : 20а = 1/2а = 0,5Вариант № 2№ 16х = 28 - х6х + х = 287х = 28х = 28 : 7х = 4№ 29 - 4х = 3х - 409 - 4х - 3х = - 409 - 7х = - 407х = 9 - (- 40)7х = 49х = 49 : 7х = 7№ 30,9х - 7,4 = - 0,4х + 4,30,9х + 0,4х = 4,3 + 7,41,3х = 11,7х = 11,7 : 1,3х = 10,4№ 44/9х + 14 = 1/6х + 94/9х - 1/6х = 9 - 148/18х - 3/18х = - 55/18х = - 5 х = - 5 : 5/18х = - 18№ 59 * (- 8 + 3у) = 18 - 3у9 * (3у - 8) = 18 - 3у27у - 72 = 18 - 3у27у + 3у = 18 + 7230у = 90у = 90 : 30у = 3№ 65х - 3 * (х + 4,2) = 4 * (х + 2)5х - 3х - 12,6 = 4х + 82х - 12,6 = 4х + 82х - 4х = 8 + 12,6- 2х = 20,6х = 20,6 : (- 2)х = - 10,3№ 72/3 * (1/3х - 1/2) = 4х + 2 1/22/9х - 1/3 = 4х + 5/22/9х - 4х = 1/3 + 5/22/9х - 36/9х = 2/6 + 15/6- 34/9х = 17/6х = 17/6 : (- 34/9)х = 17/6 * (- 9/34)х = - 3/4№ 82 * (8х - 7) = 18 - 4 * (5 - 4х)16х - 14 = 18 - 20 + 16х16х - 14 - 18 + 20 - 16х = 0Нет решений№ 9 0,3 - 6----------- = ------------0,5х - 3 9х + 30,3 * (9х + 3) = - 6 * (0,5х - 3)2,7х + 0,9 = - 3х + 182,7х + 3х = 18 - 0,95,7х = 17,1х = 17,1 : 5,7х = 3№ 104ах = 844а * (-3) = 84-12а = 84а = 84 : (- 12)а = 7
Ответ:
Пошаговое объяснение:
