Question

Qual é o valor de x que equilibra os pratos da balança?

a)5x + 3x = 16
b)x + x + 8 = 54
c)7x - 2- 5x =18
d)12x - 10x - 4 = 3
e)- x - 2x - 4 = 11
f) 8x = 5x + 4,5

Answer 1

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

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

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

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

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

f) 8x=5x+4.5
8x-5x=4.5
3x=4.5
x=4.5/3
x=1.5