Question

a) x+5=4+2

b) 3 x+1=10

c) 3 x-1=5

d) 4 x+1=7

e) 20+3 x=2


Agradeço a todos que ajudarem :)

Answer 1

Olá!

A) x + 5 = 4 + 2
x = 4 + 2 - 5 
x = 6 - 5
x = 1

B) 3x + 1 = 10
3x = 9
x = 9 ÷ 3
x = 3

C) 3x - 1 = 5
3x = 5 + 1 
x = 6 ÷ 3
x = 2

D) 4x + 1 = 7
4x = 7 - 1
x = 6 ÷ 4   (Simplifica)
x = 3/2 

E) 20 + 3x = 2
3x = 2-20
x = -18 ÷ 3
x = -6

Answer 2

a) x=4+2-5=> x=1
b)3x+1=10=> 3x=10-1=> 3x=9=> x=9/3=> x=3
c)3x-1=5=> 3x=5+1=>3x=6=>x=6/3=>x=2
d)4x+1=7=>4x=7-1=>4x=6=>x=6/4(÷2)=>x=3/2
e)20+3x=2=>3x=2-20=>3x=-18=>x=-18/3=>x=-6