Question

Resolva as seguintes equações:
1)12-3 (2x+5)=1+4 (x+4)
2)7-22 (3x-5)=2+3 (4x-7)

Answer 1

1) 12-3(2x+5)=1+4(x+4)

12-6x-15=1+4x+16

-6x-4x=1+16-12+15

-10x=17-12+15

-10x=5+15-

10X=20 (-1)

x=-20/10x=-2


2)7-22(3x-5)=2+3(4x-7)


7-66x+110=2+12x-21


-66x-12x=2-21-110-7


-78x=-19-110-7

-78x=-129-7


-78x=136 (-)


x=-136/78


X=68/39