Question

Rezolvă în R următoarele ecuații
Vă rog dau coroană
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Answer 1

a)

$x + \frac{1}{7} = \frac{8}{7} \\ x = \frac{8}{7} - \frac{1}{7} \\ x = \frac{8 - 1}{7} \\ x= \frac{7}{7} \\ \orange{\boxed{ x = 1}}$

b)

$x - \frac{1}{3} = \frac{5}{3} \\ x = \frac{5}{3} + \frac{1}{3} \\ x = \frac{5 + 1}{3} \\ x = \frac{6}{3} \\ \blue{\boxed{x = 2}}$

c)

$x + \frac{1}{6} = \frac{7}{6} \\ = \frac{7}{6} - \frac{1}{6} \\ x = \frac{7 - 1}{6} \\ x = \frac{6}{6} \\ \purple{ \boxed{x = 1}}$

La fel și la celelalte...

BAFTĂ!!!

Answer 2

Răspuns:

a) x + 1/7 = 8/7

x = 8/7 - 1/7

x = 7/7

x = 1

b) x - 1/3 = 5/3

x = 5/3 + 1/3

x = 6/3

x = 2

c) x + 1/6 = 7/6

x = 7/6 - 1/6

x = 6/6

x = 1

d) 1/4 + 2x = 1 3/4

1/4 + 2x = 7/4

2x = 7/4 - 1/4

2x = 6/4

2x = 3/2

2x : 2 = 3/2 : 2

x = 3/2 : 2

x = 3/2 × 2

x = 3/4 = 0,75

e) 3/8 - 3x = 2 5/8

3/8 - 3x = 21/8

-3x = 21/8 - 3/8

-3x = 18/8

-3x = 9/4

-3x : ( -3 ) = 9/4 : ( -3 )

x = - 9/4 : 3

x = - 9/4 × 1/3

x = - 3/4 = - 0,75

f) 5/9 - 5x = 2 2/9

5/9 - 5x = 20/9

-5x = 20/9 - 5/9

-5x = 15/9

-5x = 5/3

-5x : ( - 5 ) = 5/3 : ( - 5 )

x = -5/3 : 5

x = -5/3 × 1/5

x = -1/3 = -0,3