Question

Atividade sobre equações:

a) m + 5 = 10

b) x – 12 = 23

c) x + 4 = -2x + 25

d) 5.x = 50

e) - 6.x = +6

f) x/4 = 8

g) 7.x = - 49

h) X/5 = -11

i) 8a + 2a = 100 – 60

j) 3.(x + 2) = 36

k) 9x = 5.(x – 1) ​

Answer 1

a) m = 10 - 5
m = 5

b) x = 23 + 12
x = 35

c) x + 2x = 25 - 4
3x = 21
x = 7

d) x = 50/5
x = 10

e) x = 6/(-6)
x = -1

f) x = 8 * 4
x = 32

g) x= -49/7
x = -7

h) x = -11 * 5
x = -55

i) 10a = 40
a = 4

j) 3x + 6 = 36
3x = 36 - 6
3x = 30
x = 30/3
x = 10

k) 9x = 5x - 5
9x - 5x = -5
4x = -5
x = -5/4