Question

X = 3
Exercício
Resolva as equações:
a) x - 4 = 12
b) x + 5 = 17
c) 6 + x = 8
d) 2x - 3 = 12
e) 5x + 15 = 40
f) 3x - 9 = 18
g) 4x + 8 = 3x - 5
h) ) 3a - 4 = a + 12
i) 15x - 1 = 8x + 28
h) 6.x = 18
1) 7.x = 49
j) 5x = 30 - 2x +15
k) 3X-6 = 2x +3
i)1 2 + 4x = 2x + 10
m) 5x + 4 = 14​

Answer 1

Resposta:

a) x = 12 + 4 = 16

b) x = 17-5 = 12

c) x = 8-6 = 2

d) 2x = 12-3 > x=15/2

e) 5x= 40-15 > x=25/5 > x=5

f) 3x = 18+9 > x= 27/3 >x=9

g) 4x-3x = -5-8 > x = -13

h) 3a-a = 12+4 > 2a = 16 > a= 8

i) 15x-8x = 28+1 > 7x = 29 > x = 29\7

j) x = 18/6 > x = 3

k) x = 49/7 > x=7

l) 5x + 2x = 30+15 > 7x = 45 > x = 45/7 > x=7

m) 3x-2x = 3+6 > x=9

n) 4x-2x = 10-2 > 2x=8 > x = 8/2 > x= 4

o) 5x = 14-4 > x= 10/5 > x=2

Espero ter ajudado :)