Question

Resolva as equaçoes

A 18-43=63

B 23x-16=14-17x

C 10y-5(1+y)=(2y-2)-20

D 9x+9+3x=15

E 17x-7x=x+18

F 4x-7=8x-2

Answer 1

A). 18-43=63
-25=63 (F)

B). 23X-16=14-17X
23X+17X=14+16
40X =30
X=30/40
X=15/20

C). 10y-5(1+y)=(2y-2)-20
10y-5-y=2y-2-20
10y-y-2y=-2-20+5
-7y=-17/(-1)
7y=17
y=17/7


D). 9X+9+3X=15
9X+3X=15-9
12X=6
X=6/12 ÷3
X=2/4 ÷2
X=1/2


E) 17X-7X=X+18
17X-7X-X=18
9X=18
X=18/9
X=2

F). 4X-7=8X-2
4X-8X=-2+7
-4X=5/(-1)
4X=-5
X=-5/4