Question

0,4(х-9)-0,3(х+2)=0,7​

Answer 1

1. 0.4x-3.6-0.3x-0.6=0.7
2. 0.1x-4.2=0.7
3. 0.1x=4.9
4. x=4.9:0.1
5. x=49

Answer 2

0,1x-4,2=0,7

0,1x=0,7+4,2

0,1x=4,9

x=4,9:0,1

x=49

Answer 3

To solve the equation 0.4(x - 9) - 0.3(x + 2) = 0.7, we can follow these steps:

Step 1: Distribute the terms within the parentheses: 0.4x - 3.6 - 0.3x - 0.6 = 0.7

Step 2: Combine like terms: (0.4x - 0.3x) + (-3.6 - 0.6) = 0.7 0.1x - 4.2 = 0.7

Step 3: Move the constant term to the other side of the equation: 0.1x = 0.7 + 4.2 0.1x = 4.9

Step 4: Solve for x by dividing both sides by 0.1: x = 4.9 / 0.1 x = 49

Therefore, the solution to the equation 0.4(x - 9) - 0.3(x + 2) = 0.7 is x = 49.