Question

11) resolva as expressoes algébricas :
a) 5 + 2x = 1
b) 5x -1 = - x + 11
c) 9x - 2 = 4x + 18
d) x + 7 = -2x + 175
e) 5-2x = -17

Answer 1

a) 2x = 1 -5
2x = -4
x = -4/2
x = -2

b) 5x + x = 11 + 1
6x = 12
x = 12/6
x = 2

c) 9x - 4x = 18 + 2
5x = 20
x = 20/5
x = 4

d) x + 2x = 175 - 7
3x = 168
x = 168/3
x = 56

e) 5 + 17 = 2x
22 = 2x
22/2 = x
11 = x