Question

Решите уравнения СРОЧНО!!!! С ПОШАГОВЫМ ОБЬЯСНЕНИЕМ!!!!
1 )17х-24= -120+х
2) 5(х-6) = 15(х-8)
3) 7-3(2х+1) = 10
4) 7х+5 = 9х-11
5) 2х+5 = 2(х+1)+11
6) 3(4х+7) +2= 4(8х-3)

Answer 1

Ответ:

$1) 17x - 24 = - 120 + x \\ 17x - x = - 120 + 24 \\ 16x = - 96 \\ x = - 6$

$2)5(x - 6) = 15(x - 8) \\ 5x - 30 = 15x - 120 \\ 120 - 30 = 15x - 5x \\90 = 10x \\ x = 9$

$3)7 - 3(2x + 1) = 10 \\ 7 - 6x - 3 = 10 \\ 4 - 6x = 10 \\ - 6x = 10 - 4 \\ - 6x = 6 \\ x = - 1$

$4)7x + 5 = 9x - 11 \\ 7x - 9x = - 11 - 5 \\ - 2x = - 16 \\ x = 8$

$5)2x + 5 = 2(x + 1) + 11 \\ 2x + 5 = 2x + 2 + 11 \\ 2x - 2x = 2 + 11 - 5 \\ x = 7$

$6)3(4x + 7) + 2 = 4(8x - 3) \\ 12x + 21 + 2 = 32x - 12 \\ 12x - 32x = - 12 - 21 - 2 \\ - 20x = - 35 \\ x = 1.75$

Answer 2

Ответ:

1)17×-×=-120+24

16×=-96

×=--6

2)5×-30=15×-120

5×-15×=-120+30

-10×=-90

×=9

3)7-6×-3=10

-6×=10+3-7

-6×=6

×=-1

4)7×-9×=-11-5

-2×=-16

×=8

5)2×+5=2×+2+11

2×-2×=2+11-5

×=8

6)12×+21+2=32×-12

12×-32×=-12-2-21

-20×=-35

×=35÷20

×=1.75