Question

Resolva a)3x+5=x+15
b)3x-10=x+10-X
c)3x=x+18
d)4x+1=x+7
e)3x+3=12
f)x+5=2x+4
g)4.(2x-x)=3x+7-2
h)x. (2+1) = -x -15 +1

Answer 1

a) 2x = 10
x = 10/2
x = 5

b) 3x = 20
x = 20/3
x = 6,6666...

c) 2x = 18
x = 18/2
x = 9

d) 3x = 6
x = 6/3
x = 2

e) 3x = 9
x = 9/3
x = 3

f) -x = -1 (multiplica isso por -1)
+x = +1

g) 8x - 4x = 3x+7-2
x = 5

h) 2x + 1x = -x - 15 + 1
4x = -14
x = -14/4
x = -3,5

Answer 2

3x - x = 15 -5
2x = 10
x = 5
3x-x = 18
2x = 18
x = 9

4x - x = 7 - 1
3x = 6
x = 2

3x = 12- 3
3x = 9
x = 3

x -2x = 4 - 5
(-x = -1)(-1)
x = 1

8x - 4x =3x + 5
4x - 3x = 5
x = 5


2x + 1x = -x -14
2x + 2x =-14
4x = -14
x = -14/4