Question

resolva só a letra (A)

Answer 1

(x+1)/2 + (x-1)/3 = 1/2
mmc de 2 e 3 = 6

6:2*(x+1) + 6:3*(x-1) = 6:2*1
3*(x+1) + 2*(x-1) = 3*1
3x+3 + 2x-2 = 3
3x+2x = 3-3+2
5x = 2
x = 5/2