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3x = -5(7) 4(5x) = 6(3) 10(- x) = 5(-3)
3x = - 35 20x = 18 - 10x = - 15
x = - 35/3 x = 18/20 x = - 15/-10
x = 9/10 x = 3/2
D) - 8x = 2.25 E) - 4x/5 = 8/15 F) 2x/7 - 8 = 2
x = 2.25/- 8 15(- 4x) = 5(8) 2x/7 = 2 + 8
x = - 2.25/8 - 60x = 40 2x/7 = 10
x = - 40/60 2x = 10(7)
x = - 4/6 2x = 70
x = - 2/3 x = 70/2
x = 35
G) 5x/6 - 0.5 = 2.1 H) - 4x/3 + 6 = 5/3 I) - 5x/8 + 7/2 = - 4
5x/6 = 2.1 + 0.5 - 4x/3 = 5/3 - 6 - 5x/8 = - 4 - 7/2
5x/6 = 2.6 - 4x/3 = - 13/3 - 5x/8 = - 15/2
5x = 2.6(6) En una igualdad los 2(- 5x) = 8 (- 15)
5x = 15.6 denominadores iguales - 10x = - 120
x = 15.6/5 se eliminan: x = - 120/- 10
x = 3.12 - 4x = - 13 x = 12
x = -13/- 4
x = 13/4
J) 6x/- 7 - 1/3 = - 3/2
6x/ - 7 = - 3/2 + 1/3
6x/ - 7 = - 7/6
6(6x) = - 7(- 7)
36x = 49
x = 49/36