Question

4x-13=6x+7 5(x+3)=12,5x 14+5x=4x+3 3a+5=8a-15 3,6+2x=5x+1,2 4,2-2x=5,4+3x 4(3-2x)+24=2(3+2x) 0,2(5y-2)=0,3(2y-1)-0,37 2,7x-(-(x-9)-(2x+1))=27 49x-(5x-6-(11-8x))=32

Answer 1

4х-13=6х+7
4х-6х=7+13
-2х=20
х=20/-2
х=10


5(х+3)=12,5х
5х+15=12,5х
5х-12,5х=-15
-7,5х=-15
х=-15/-7,5
х=2

14+5х=4х+3
5х-4х=3-14
х=-11

3а+5=8а-15
3а-8а=-15-5
-5а=-20
а=-20/-5
а=4

3,6+2х=5х+1,2
2х-5х=1,2-3,6
-3х=-2,4
х=-2,4/-3
х=0,8

4,2-2х=5,4+3х
-2х-3х=5,4-4,2
-5х=1,2
х=1,2/-5
х=-0,24

4(3-2х)+24=2(3+2х)
12-8х+24=6+4х
-8х-4х=6-12-24
-12х=-30
х=-30/-12
х=2,5

0,2(5у-2)=0,3(2у-1)-0,37
у-0,4=0,6у-0,3-0,37
у-0,6у=-0,3-0,37+0,4
0,4у=-0,27
у=-0,27/0,4
у=-0,675


P.S- /-это деление
P.S.S- последние 2 не могу решить точно,т.к в знаках я путаюсь,и могу сделать ошибку(

Answer 2

1) 4x - 13 = 6x + 7 To solve this equation, we need to isolate the variable x. We can do this by subtracting 4x from both sides and adding 13 to both sides: -13 + 13 = 6x - 4x + 7 0 = 2x + 7 Next, we can subtract 7 from both sides: -7 = 2x Finally, we divide both sides by 2 to solve for x: -7/2 = x

2) 5(x + 3) = 12 To solve this equation, we need to distribute the 5 to both terms inside the parentheses: 5x + 15 = 12 Next, we can subtract 15 from both sides: 5x + 15 - 15 = 12 - 15 5x = -3 Finally, we divide both sides by 5 to solve for x: 5x/5 = -3/5 x = -3/5

3) 5x + 14 + 5x = 4x + 3 + 3a To solve this equation, we need to combine like terms on both sides. First, we can combine the x terms on the left side: 10x + 14 = 4x + 3 + 3a Next, we subtract 4x from both sides: 10x - 4x + 14 = 4x - 4x + 3 + 3a 6x + 14 = 3 + 3a Next, we can subtract 3 from both sides: 6x + 14 - 3 = 3 + 3a -