Question

Preciso urgentemente resolver as equações
A 3(x+1)
B -2x+5=3x-9
C 4(x+5)=-6(x+4)
D -9x-15=2x+19
E -2(x+4)=-5(x+4)
F 45x=9
G 48x=18
H 12x-5=-10x-13

Answer 1

A) 3x + 1
x = -1/3 (se igualar a zero)

B) 5 + 9 = 3x + 2x
14 = 5x
x = 14/5

C) 4x + 20 = -6x - 24
4x + 6x = -24 - 20
10x = - 44
x = -22/5

D) -9x - 15 = 2x + 19
-9x - 2x = 19 + 15
-11x = 34
x = -34/11

E) -2x - 8 = -5x - 20
-2x + 5x = -20 + 8
3x = -12
x = -4

F) 45x = 9 (:3)
15x = 3 (:3)
5x = 1
x = 1/5

G) 48x = 18 (:2)
24x = 9 (:3)
8x = 3
x = 3/8

H) 12x - 5 = 10x - 13
12x - 10x = - 13 - 5
2x = - 18
x = -9