Question

Indica el numero de soluciones en cada caso por favor ayudenme si esque si no me ayudan boy a perder el año a)2x+5=7 b)5/3=10x-7/6(x+1) c)2x-2=2(x-1) d)7(2x+1)=14x

Answer 1

2x + 5 = 7

2x = 7 - 5

2x = 2

x = 2/2

x = 1
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5/3 = 10x - 7/6 (x+1)

5/3 = (6) (10) + (- 7 (x + 1))/6 

5/3 = (6 * 10x - 7 (x + 1))/6

5/3 = 60x - 7 (x + 1)/6

5/3 = (60x - 7x - 7)/6

5/3 = (53x - 7)/6

10 = 53x - 7

10 + 7 = 53x

17/53 = x

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2x - 2 = 2 (x - 1)

2x - 2 = 2x - 2

2x - 2x = - 2 + 2

0x = 0---no hay solución.
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7 (2x + 1) = 14x

14x + 7 = 14x

14x - 14x = - 7

0x = - 7---no hay solución.