Question

resolva as equações abaixo:
a) 4x = 40
b)x+3=10
c)3x-1=17
d)4x+3=9+4x
e)7x-11=3x+5
f)5(x-1)-2=3(x+2)
g)2(x-4)=5(x-1)+2

Answer 1

a) 4x=40
x= 40/4 
x= 10

b) x+3=10
x= -3+10
x= 7

c) 3x+1=17
3x= -1 +17
3x= 16
x= 16/3

d) 4x+3=9+4x
4x-4x= -3 +9
x= 6

e ) 7x-11=3x+5
7x-3x= +11 +5
4x= 16
x= 16/4
x= 4

f) 5(x-1) - 2= 3(x+2)
 5x - 5 -2= 3x + 6
5x -3x= +5 +2 +6
2x= 13
x = 13/2

g) 2(x-4) = 5(x-1) +2
 2x + 8 = 5x - 5 +2
2x -5x = -8 -5 +2
- 3x = - 11    .(-1)
+3x= +11
x= 11/3