Question

por favor mim ajude. b} x-x/9= -1 c} x/2+x/7= -1 d} x-1/2= x+4/3

Answer 1

b
x /1- x/9 = - 1
mmc = 9
9x - x = - 9
8x = - 9
x = -9/8 ***

c
x/2 + x/7 = -1/1
mmc = 2.7 = 14
7x + 2x = -14
9x = -14
x = -14/9 ***

d
x/1 - 1/2 = x/1 + 4/3
mmc = 2.3 = 6
6x - 3 = 6x + 8
6x - 6x = 8 + 3
0 x = 11
x = 11/0   x tende para o infinito ***