Question

18/40-(13/40-х)=7/40

Answer 1

Ответ:

18-(13-40х)= 7

18-13+40х=7

5+40х=7

40х= 7-5

40х= 2

х=0.05

Answer 2

Ответ:

¹³/40-Х=¹⁸/40-⁷/40

¹³/40-Х=¹¹/40

Х=¹³/40-¹¹/40

Х=²/40

проверка

¹⁸/40-(¹³/40-²/40)=⁷/40

⁷/40=⁷/40

Answer 3

To solve the equation 18/40 - (13/40 - x) = 7/40, you can follow these steps:

Step 1: Simplify the equation by subtracting (13/40 - x) from 18/40 on the left side:

(18/40) - (13/40 - x) = 7/40

Step 2: Subtract 13/40 from 18/40:

(18/40) - (13/40) + x = 7/40

Step 3: Subtract (13/40) from (18/40):

(18/40 - 13/40) + x = 7/40

Step 4: Simplify the fractions on the left side:

(5/40) + x = 7/40

Step 5: Further simplify the fractions:

(1/8) + x = 7/40

Step 6: Now, isolate x by subtracting 1/8 from both sides:

x = 7/40 - 1/8

Step 7: Find a common denominator to subtract the fractions:

x = (7/40) - (5/40)

Step 8: Subtract the fractions:

x = 2/40

Step 9: Simplify the fraction:

x = 1/20

So, the solution to the equation is x = 1/20.