Question

Resolva em R as equações:
a. 3(2x + 1) – (x – 1) = - 1
b. 2x + 1 = x + 4
c. 5x + 2(x – 1) < 12

Answer 1

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

b) 2x + 1 = x + 4
x = 3

c) 5x + 2(x - 1) < 12
5x + 2x - 2 < 12
7x < 14
x < 2