Question

21. Halla x en cada caso:
a) 2(x + 5) = 16
b) 5 = 3 . (1 - 2x)
c) 5(x - 1) = 3x - 4
d) 5x - 3 = 3 - 2(x-4)
e) 10x- (4x - 1) = 5. (x-1) + 7
f) 6(x - 2) - x = 5(x - 1)
g) 7(x - 1) - 4x - 4(x - 2) = 2
h) 3(3x - 2) - 7x = 6(2x - 1) - 10x
i) 4x + 2(x + 3) = 2(x + 2) ​

Answer 1

Explicación paso a paso:

A. 2(X + 5) = 16

2X + 10 = 16

2X = 16 - 10

2X = 6

X = 6/2

X = 3

B. 5 = 3 . (1 - 2X)

5 = 3 - 6X

5 - 3 = - 6X

2 = - 6X

6X = -2

X = -2/6

C. 5(X - 1) = 3X - 4

5X - 5 = 3X - 4

5X - 3X = -4 + 5

2X = 1

X = 1/2

D.5X - 3 = 3-2 (X-4)

5X-3 = 3 -2X +8

5X+2X=3+8+3

7X=14

X=14/7

X=2

E. 10X -(4X-1) = 5 (X-1) +7

10X -4X +1 = 5X -5 +7

10X-4X -5X = -5+7-1

X=1

F. 6(X-2) -X= 5 (X-1)

6X -12 -X = 5X -5

6X -X -5X = -5 +12

X=7

G. 7 (X-1) -4X -4 (X-2) =2

7X-7 -4X-4X +8= 2

7X-4X -4X=2-7-8

7X=-3

X=-3/7