Задание по математике (уравнения)

Question

1) 3 ,5 – x = 9,3; 2) 2x – 7 = 0; 3) 42 – 1 3 x = 60; 4) 17 + 2x = 5x + 5. 5) 2x – 1 = –1,8; 6) 3x = –81 7) ) –0,3x = 6;

user_222057516 · Accepted Answer

1) -х = 9.3-3.5
-х = 5.8
х= 5.8
2) 2х = 7
х= 7:2
х = 3.5
3) -3х = 60-42
-3х = 18
-х = 18:3
-х = 6
х = 6
4)2х - 5х = 5 - 17
-3х = -12
3х = 12
х = 12:3
х = 4
5) 2х = -1.8 + 1
2х = 0.8
х = 0.8:2
х = 0.4
6) х = -81:3
х = -27
7) х = 6 : -0.3
х = -20

naumenko_17 · Answer

2) 2x – 7 = 0;
2х=7
х=7\2
5)2х-1=-1,8
2х=-1,8+1
х=0,8:2
1) 3 ,5 – x = 9,3; 
х=3.5-9.3
х= -
3)3) 42 – 1 3 x = 60;
42-60=13х
х=18\13  1 5/13
6) 3x = –81
  х=-81:3
7) ) –0,3x = 6;
х=6:(-0,3)

taras_drenkalo · Answer

1. х=-5,8
2. х=3,5
3. х=-18/13
4. х=4
5. х=-0,4
6. х=-27
7. х=-20