Question

-8х=3,2 10х+7=312х-3/4=03х+6=5×(х-1)+1012х-(7-3х)= 4х2х-(5-) 3х+4))=х-5Помогите

Answer 1

1. -8x=3.2
x=-0.4

2. 10x+7=3
10x=3-7
10x=-4
x=-0.4


3. 12x-3/4=0
12x=3/4
x=1/16

4.3x+6=5×(x-1)+10
3x+6=5x-5+10
3x-5x=-5+10-6
-2x=-1
x=0.5

5.12x-7+3x=4x
11x=7
x=7/11

Answer 2

Sure, I'd be happy to help you solve these equations step-by-step:

1. -8x = 3.2 To solve for x, divide both sides by -8: x = 3.2 / -8 x = -0.4

2. 10x + 7 = 31 To solve for x, subtract 7 from both sides and then divide by 10: 10x = 31 - 7 10x = 24 x = 24 / 10 x = 2.4

3. 12x - (7 - 3x) = 4x First, simplify the equation within the parentheses: 12x - (7 - 3x) = 4x 12x - 7 + 3x = 4x Combine the x terms on the left side: 12x + 3x - 7 = 4x 15x - 7 = 4x Now, move all the x terms to one side by subtracting 4x from both sides: 15x - 4x - 7 = 4x - 4x 11x - 7 = 0 Next, add 7 to both sides: 11x - 7 + 7 = 0 + 7 11x = 7 Finally, divide both sides by 11 to solve for x: x = 7 / 11 x = 0.636363... (repeating decimal)

4. 2x - (5 - 3x + 4) = x - 5 First, simplify the equation within the parentheses: 2x - (5 - 3x + 4) = x - 5 2x - (9 - 3x) = x - 5 Next, distribute the negative sign through the parentheses: 2x - 9 + 3x = x - 5 Combine the x terms on the left side: 2x + 3x - 9 = x - 5 5x - 9 = x - 5 Now, move all the x terms to one side by subtracting x from both sides: 5x - x - 9 = x - x - 5 4x - 9 = -5 Next, add 9 to both sides: 4x - 9 + 9 = -5 + 9 4x = 4 Finally, divide both sides by 4 to solve for x: x = 4 / 4 x = 1

Please double-check each solution to ensure accuracy. If you have any other equations or need further assistance, feel free to ask!