Question

Equação em R:
a) 2x + 3 (x-5) = 4x + 9

b) 2 (x +1) - 3 (2x - 5) = 6x - 3

c) 3x - 5 = x - 2

Answer 1

a) 2x + 3 (x-5) = 4x + 9
2x +3x -15 = 4x +9
2x +3x -4x = 9 +15
5x -4x = 24
x= 24

b) 2 (x +1) - 3 (2x - 5) = 6x - 3
2x +2 -6x +15 = 6x -3
2x -6x -6x = -3 -2 -15
2x -12x = -5 -15
-10x = -20 . (-1)
10x = 20
x= 20 / 10
x= 2


c) 3x - 5 = x - 2
3x -x = -2 +5
2x = 3
x= 3/2

Bons estudos!