Question

resolva as equaçoes:

obs : RESPOSTA

A] 5×+3×=16

B] ×+×+8=54

C] 7×-2 -5×=18

D] 12×-10×-4=3

E} -× -2×-4=11

F} 8×=5×+4,5

Answer 1

a) 5x + 3x = 16
8x = 16
x = 16 / 8
x = 2

b) x+x+8 = 54
2x = 54 - 8
2x = 46
x = 46 / 2
x = 23

c) 7x - 2 - 5x = 18
7x - 5x = 18 + 2
2x = 20
x = 20 / 2
x = 10

d) 12x - 10x -4 = 3
12x - 10x = 3+ 4
2x = 7
x = 7 / 2

e) -x - 2x -4 = 11
-x - 2x = 11 +4
3x = 15
x = 15 / 3
x = 5

f) 8x = 5x + 4,5
8x - 5x = 4,5
3x = 4,5
x = 4,5 / 3