Question

ecuaciones de primer grado ayuda pliss

Answer 1

1)
[(7 - 2X)/(2 - X)] = 1


(7 - 2X) = 1(2 - X)

7 - 2X = 2 - X

7 - 2 = - X + 2X

5 = X

2) [(2X - 10)/5] = 2X + 1

2X - 10 = 5(2X + 1)

2X - 10 = 10X + 5

-10 - 5 = 10X - 2X

-15 = 8X

X = -15/8

3) [10/(2 - 3X)] = 3

10 = 3(2 - 3X)

10 = 6 - 9X

10 - 6 = -9X

4 = - 9X

X = -4/9.

4) [(2X - 10)/5] = 3(X + 1)

2X - 10 = 15(X + 1)

2X - 10 = 15X + 15

-10 - 15 = 15X - 2X

-25 = 13X

X = -25/13