Question

Найдите x:5)2/3x=-3/8 6)40,5:x=4 7)-32/63:x=8/21 8)x:2/7=-1,4

Answer 1

5) 2\3х=-3\8

х=-3\8:2\3

х=-3\8*3\2

х=-9\16

6) 40,5:х=4

х=40,5:4

х=10,125

7)-32\63:х=8\21

х=-32\63:8\21

х=-32\63*21\8

х=-4\3=-1 1\3

8)х:2\7=-1,4

х=-1,4*2\7

х=-7\5*2\7

х=-2\5

Answer 2

5) 2/3x=-3/8

16х=-9

х=-9/16

6)40,5:x=4

х=40,5:4

х=10,125

7)-32/63:x=8/21

-32/63*1/х=8/21

63х*8=-32*21

504х=-672

х=-1 21/63
х=-1 1/3

проверка
-32/63:(-84/63)=8/21
(32*63)/(63*84)=8/21
32/84=8/21
8/21=8/21

8)x:2/7=-1,4

х*7/2=-1 4/10

7х/2=-14/10

7х/2=-7/5

35х=-14

х=-14/35

х=-2/5

Answer 3

To find the value of x in each equation, we need to isolate x on one side of the equation. Let's solve each equation step by step:

5. (2/3)x = -3/8

To solve for x, we'll first multiply both sides by the reciprocal of (2/3), which is (3/2):

(3/2) * (2/3)x = (3/2) * (-3/8)

On the left side, the (2/3) and (3/2) cancel out, leaving:

x = -(3/2) * (3/8)

Now, multiply the fractions:

x = -9/16

So the solution is x = -9/16.

6. 40.5/x = 4

To solve for x, we'll first isolate x by multiplying both sides by x:

x * (40.5/x) = x * 4

On the left side, x/x cancels out, leaving:

40.5 = 4x

Now, divide both sides by 4 to solve for x:

x = 40.5 / 4

x = 10.125

So the solution is x = 10.125.

7. (-32/63) / x = 8/21

To solve for x, we'll first take the reciprocal of (8/21), which is (21/8):

(-32/63) / x = 21/8

Now, multiply both sides by x to isolate x:

x * ((-32/63) / x) = x * (21/8)

On the left side, x/x cancels out:

-32/63 = (21/8) * x

To solve for x, multiply both sides by the reciprocal of (21/8), which is (8/21):

(-32/63) * (8/21) = x

Now, multiply the fractions:

x = -256/1323

So the solution is x = -256/1323.

8. x / (2/7) = -1.4

To solve for x, we'll first take the reciprocal of (2/7), which is (7/2):

x * (7/2) = -1.4

Now, divide both sides by (7/2) to isolate x:

x = -1.4 / (7/2)

To divide by a fraction, we multiply by its reciprocal:

x = -1.4 * (2/7)

Now, multiply the fractions:

x = -0.4

So the solution is x = -0.4.

Therefore, the solutions for each equation are:

5. x = -9/16
6. x = 10.125
7. x = -256/1323
8. x = -0.4