Question

alguém me ajuda a resolver pfv???? estou desesperada!!

a) x-2/x+4=x-1/x+3

b) x+1/3-2x-1/5=2.(x-2)-7x/3

Answer 1

primeiro calculamos o MMC do valor:
x-2\x+4=x-1\x+3
x²-x-6\x²+7x-12=x²+5x+4\x²+7x-12

cortamos os valores simétricos:
x²-x-6-x²-5x-4
-6x=-10 (-1)
x=10\6

b)x+1\3-2x-1\5=2(2x-2)-7x\3
x+1\3-2x-1\5=2x-4-7x\3

cálculo de MMC:
x+1\3--2x-3\15=30x-60=35
x+1-9x-6x=90x-60x-105x-70x
100x-70x
260x-200
x=200\10
x=20