Question

1) 0,4(x-2)=1,4(x+3) 2) 175,68-(x-13,7)=128,78

Answer 1

1) 0,4x-0,8=1,4x+4,2
-x=5
x=-5
2) 175,68-x+13,7=128,78
-x=128,78-175,68-13,7
-x=-47,9-13,7
-x=-61,6
x=61,6

Answer 2

1)0,4(х-2)=1,4(х+3)
0,4х-0,8=1,4х+4,2=
=0,4х-1,4х=4,2+0,8=
-х=5
х=-5.

2)175 68-(х-13,7)=128,78
=175,68+х+13,7=128,78=
=189,38+х=128,78=
х=128,78-189,38
х=-60,6
:)

Answer 3

To solve the given equations, follow these steps:

1. 0.4(x - 2) = 1.4(x + 3)

Step 1: Distribute the numbers inside the parentheses. 0.4x - 0.4(2) = 1.4x + 1.4(3)

Step 2: Simplify and solve for x. 0.4x - 0.8 = 1.4x + 4.2

Step 3: Move all x terms to one side and constants to the other side. 0.4x - 1.4x = 4.2 + 0.8

Step 4: Combine like terms. -1x = 5

Step 5: Solve for x. x = -5

So the solution for the equation is x = -5.

2. 175.68 - (x - 13.7) = 128.78

Step 1: Distribute the negative sign to the terms inside the parentheses. 175.68 - x + 13.7 = 128.78

Step 2: Combine like terms. (175.68 + 13.7) - x = 128.78

Step 3: Simplify the left side. 189.38 - x = 128.78

Step 4: Move the constant to the other side by subtracting 189.38 from both sides.

• x = 128.78 - 189.38

Step 5: Simplify the right side.

• x = -60.60

Step 6: Solve for x by multiplying both sides by -1 (to isolate x). x = 60.60

So the solution for the equation is x = 60.60.