Question

(450:x+50) :70=2 (14-у)×4-9=19

Answer 1

2) (14у) * 4 - 9=19

 14у * 4-9=19

56у-9=19

56у=19+9

56у=28

у=1/2 или 0,5

Answer 2

450:х+50=70*2

450х+50=140

450х=140-50

450х=90

х=90:450

х=0,2

(14-у)*4=19+9

(14-у)*4=28

14-у=28:4

14-у=7

у=7:14

у=0,5

Answer 3

To solve the equations, let's start with the first one:

(450:x + 50) / 70 = 2

To isolate x, we need to perform the following steps:

1. Multiply both sides by 70 to eliminate the denominator: 70 * [(450:x + 50) / 70] = 2 * 70

This simplifies to: 450:x + 50 = 140

2. Subtract 50 from both sides to isolate the term with x: 450:x + 50 - 50 = 140 - 50

This simplifies to: 450:x = 90

3. Finally, divide both sides by 450 to solve for x: x = 90 / 450 x = 0.2

Now let's move on to the second equation:

(14 - у) × 4 - 9 = 19

To solve for у, follow these steps:

1. Add 9 to both sides to isolate the terms with у: (14 - у) × 4 = 19 + 9

This simplifies to: (14 - у) × 4 = 28

2. Divide both sides by 4 to get rid of the coefficient of (14 - у): (14 - у) × 4 / 4 = 28 / 4

This simplifies to: 14 - у = 7

3. Now, subtract 14 from both sides to isolate у: 14 - у - 14 = 7 - 14

This simplifies to: -у = -7

4. Finally, divide both sides by -1 to solve for у: у = -7 / -1 у = 7

So, the solutions to the equations are: x = 0.2 у = 7