Question

Me ajudem por favor!

Resolva as equações
A) 7x+5-x+8=31
B) 4x+4=16+2x
C) 4x-6=22
D) 9-x=2x
E) 8+ 4x=6x-4
F) 3X+1=X+9
G) 4x-11=7-2x
H) 13x+1-10x=5+x

Answer 1

Resolva as equações:
--------------------------------------------
a)
7x + 5 - x + 8 = 31
7x - x + 5 + 8 = 31
6x + 13 = 31
6x = 31 - 13
6x = 18
x = 18/6
x = 3
=======================
b)
4x + 4 = 16 + 2x
4x - 2x = 16 - 4
2x = 12
x = 12/2
x = 6
------------------------
c)
4x - 6 = 22
4x = 22 + 6
4x = 28
x = 28/4
x = 7
----------------------------
d)
9 - x = 2x
9 = 2x + x
9 = 3x
3x = 9
x = 9/3
x = 3
===============================
e)
8 + 4x = 6x - 4
8 + 4 = 6x - 4x
12 = 2x
2x = 12
x = 12/2
x = 6
------------------------------
f)
3x + 1 = x + 9
3x - x = 9 - 1
2x = 8
x = 8/2
x = 4
==================
g)
4x - 11 = 7 - 2x
4x + 2x = 7 + 11
6x = 18
x = 18/6
x = 3
----------------------------
h)
13x + 1 - 10x = 5 + x
13x - 10x + 1 = 5 + x
3x + 1 = 5 + x
3x - x = 5 - 1
2x = 4
x = 4/2
x = 2
============================