Question

Resolva:
a) 5X=-30
b) 7x=22
c) 4x=-20
d) x+8=2X
e) 5=8-X
f) 2×+7=x​

Answer 1

→ Cálculo :

A) 5x = -30

x = -30 ÷ 5

x = -6

B) 7x = 22

x = 22 ÷ 7

x = 22/7

C) 4x = -20

x = -20 ÷ 4

x = -5

D) x + 8 = 2x

x - 2x = - 8

-x = -8

x = 8

E) 5 = 8 - x

x = 8 - 5

x = 3

F) 2x + 7 = x​

2x - x = -7

x = -7

Answer 2

a) -6
b) 3,14
c) -5
d) -8 terços (2,66)
e) 3
f) -7