Question

resolva l) 5x -3 + x = 2x + 9 m) 17x - 7x = x + 18 n) x + x - 4 = 17 - 2x + 1 o) x + 2x + 3 - 5x = 4x - 9

Answer 1

I) 5x + x - 2x = 9 + 3
4x = 12
x = 12/4
x= 3

m) 17x - 7x = x + 18
10x -x = 18
9x = 18
x = 18/9
x= 2

n) x + x - 4 = 17 - 2x + 1
2x + 2x = 18 + 4
4x = 22
x = 22/4
x = 5,5

o) x + 2x + 3 - 5x = 4x - 9
3x - 5x - 4x = -9 -3
-2x - 4x = -12
-6x = -12
x = -12/-6 (-1)
x = 2