Question

7х-5-4=20х-19-х/7СРОЧНОО

Answer 1

Ответ:

х = 7/9

Пошаговое объяснение:

7х - 5 - 4 = 20х - 19 - х/7

7х - 20х + х/7 = 5 + 4 - 19

7*(-13х) + х/7 = -10*7

-90х = -70

х = 70/90 = 7/9

Answer 2

Ответ:

x = 1 ( целая ) 7/15 или x = 7/9 .

Пошаговое объяснение:

Решение:

I вариант.

$7x - 5 - 4= \frac{20x - 19 - x}{7} \\\\7x - 9 = \frac{19x - 19}{7} \\\\7(7x - 9) = 19x - 19 \\\\49x - 19x = - 19 + 63\\\\30x = 44\\\\x = \frac{44}{30} = \frac{22}{15} = 1\frac{7}{15}$

II вариант.

$7x - 5 - 4 = 20x - 19 - \frac{x}{7} \\\\7x - 9 = 20x - 19 - \frac{x}{7} \\\\7(7x - 9) = 7(20x - 19 - \frac{x}{7} )\\\\49x - 63 = 140x - 133 - x\\\\49x - 140x + x = - 133 + 63\\\\- 90 = - 70\\\\x = \frac{70}{90} = \frac{7}{9}$

УДАЧИ! ОБРАЩАЙТЕСЬ!

Answer 3

Let's solve the equation step by step:

Given equation: 7x - 5 - 4 = 20x - 19 - x/7

Step 1: Combine the constants on the left side of the equation: 7x - 9 = 20x - 19 - x/7

Step 2: Get rid of the fraction on the right side by multiplying everything by 7: 7(7x - 9) = 7(20x - 19) - x

Step 3: Distribute the multiplication on both sides: 49x - 63 = 140x - 133 - x

Step 4: Simplify further: 49x - 63 = 139x - 133

Step 5: Move all the x terms to one side and the constants to the other side: 49x - 139x = -133 + 63

Step 6: Combine the x terms and constants: -90x = -70

Step 7: Solve for x by dividing both sides by -90: x = (-70)/(-90)

Step 8: Simplify the fraction: x = 7/9

So the value of x that satisfies the equation is x = 7/9.