Question

determine o valor de x?

a)2x+5=27
b)4x-8=2x+6
c)7x+1=6x+6
d)5x-3=2x-9
e)5x+50=3x+290

Answer 1

a) 2x +5 = 27
2x = 27 -5
2x = 22
x = 22/2
x = 11

b) 4x -8 = 2x +6
4x -2x = 6 +8
2x = 14
x = 14/2
x = 7

c) 7x +1 = 6x +6
7x -6x = +6 -1
x = 5

d) 5x -3 = 2x -9
5x -2x = -9 +3
3x = -6
x = -6/3
x = -2

e) 5x +50 = 3x +290
5x -3x = 290 -50
2x = 240
x = 240/2
x = 120

Answer 2

a) 2x = 27 - 5
2x = 22
x = 22/2
x = 11

b) 4x -2x = 6 - 8
2x = -2
x = -2/2
x = -1

c) 7x - 6x = 6 - 1
x = 5

d) 5x - 2x = - 9 - 3
3x = -12
x = -12/3
x = -4

e) 5x - 3x = 290 - 50
2x - 240
x = 240/2
x = 120