Question

calcule as seguintes equações de 1° grau .

A) 3/7×+1/2=×+2/3

C)3(2×-4)+2=4(1/2×1)

D)2(7×-4×)+3=1+3×

E)-8.(2×-3)=1/2-3/4

Answer 1

A) 3/7×+1/2=×+2/3 Tirar o MMC(7,2,3=42)

18x +21 =42X+28/21

18x-42x=-21+28/21

- 24x = +7/21 simplificar

-24x =1/3 simplificar

-8x=1 x(-1)

8x = -1

X= -1/8