Question

1)77-(28+у)=37 2)6х+40=70 3) 46+у:5=85 4)49+(136-х*8):4=81

Answer 1

Ответ:

1)77-(28+у)=37

77 -28 -y = 37

49-y =37

-y = 37-49

-y = -12

y = 12

2)6х+40=70

6x = 70 - 40

6x = 30

x = 30:6

x = 5

3) 46+у:5=85

y:5 = 85-46

y:5 = 39

y = 39*5

y = 195

4)49+(136-х*8):4=81

49 + 34 - 2x = 81

83 -2x = 81

-2x = 81-83

-2x = -2

x = -2:(-2)

x = 1

Answer 2

Ответ:

Пошаговое объяснение:

1)

77-(28+у)=37

77 - 28 - y = 37

49 - y = 37

y = 49 - 37

y = 12

2)

6х+40=70

6x = 70 - 40

6x = 30

x = 30 : 6

x = 5

3)

46+у:5=85

y : 5 = 85 - 46

y : 5 = 39

y = 39 * 5

y = 195

4)

49+(136-х*8):4=81

(136 - 8x):4 = 81 - 49

(136 - 8x):4 = 32

136 - 8x = 32*4

136 - 8x = 128

8x = 136 - 128

8x = 8

x = 8 : 8

x = 1

Answer 3

Let's solve the given equations one by one:

1. 77 - (28 + у) = 37

To solve this equation, we'll simplify the expression inside the parentheses first:

77 - (28 + у) = 37 77 - 28 - у = 37 (remove parentheses using the distributive property) 49 - у = 37 (perform subtraction)

Now, we'll isolate the variable у by subtracting 49 from both sides:

49 - у = 37 -у = 37 - 49 -у = -12

To solve for у, we'll multiply both sides of the equation by -1:

-1 * (-у) = -1 * (-12) у = 12

Therefore, у = 12.

2. 6х + 40 = 70

To solve this equation, we'll isolate the variable х by subtracting 40 from both sides:

6х + 40 = 70 6х = 70 - 40 6х = 30

To solve for х, we'll divide both sides of the equation by 6:

(6х) / 6 = 30 / 6 х = 5

Therefore, х = 5.

3. 46 + у/5 = 85

To solve this equation, we'll isolate the variable у by subtracting 46 from both sides:

46 + у/5 = 85 у/5 = 85 - 46 у/5 = 39

To solve for у, we'll multiply both sides of the equation by 5:

5 * (у/5) = 5 * 39 у = 195

Therefore, у = 195.

4. 49 + (136 - х * 8)/4 = 81

To solve this equation, we'll simplify the expression inside the parentheses first:

49 + (136 - х * 8)/4 = 81 49 + (136 - 8х)/4 = 81

To remove the fraction, we'll multiply both sides of the equation by 4:

4 * [49 + (136 - 8х)/4] = 4 * 81 196 + 136 - 8х = 324

Combine like terms:

332 - 8х = 324

Now, we'll isolate the variable х by subtracting 332 from both sides:

332 - 8х = 324 -8х = 324 - 332 -8х = -8

To solve for х, we'll divide both sides of the equation by -8:

(-8х) / -8 = (-8) / -8 х = 1

Therefore, х = 1.