Question

Encontre a solução das seguintes equações:
A) 5x+15=10
B) 4x-40=60
C) 7x+17=16
D) 3x-49=-100
E) 3x+17=11
F) 6x-18=-6
G) 5x-9=-8
H) 9x-2=-11

Answer 1

a) 5x=10-15
5x=-5
x=-5/5
x=-1
b)4x=60+40
4x=100
x=100/4
x=25
c)7x=-17+11
7x=-6
x=-6/7
x=-0,85
d)3x=-100+49
3x=-51
x=-51/3
x=-17
e)3x=11-17
3x=-6
x=-6/3
x=-2
f)6x=-6+18
6x=12
x=12/6
x=2
g)5x=-8+9
5x=1
x=1/5
x=0,2
h)9x=-11+2
9x=-9
x=-9/9
x=-1

Answer 2

a)
5x+15=10 
5x = 10 - 15
5x = - 5
x = - 5/5
x = - 1
==================
b)
4x-40=60
4x = 60 + 40
4x = 100
x = 100/4
x = 25
==================
c)
7x + 17 = 16
7x = 16 - 17
7x = - 1
x = - 1
        7
-----------------------------------------
d)
3x - 49 = - 100
3x = - 100 + 49
3x = - 51
x = - 51/3
x = - 17
--------------------------------------
e)
3x + 17 = 11
3x = 11 - 17
3x = - 6
x = - 6/3
x = - 2
-------------------------------------
f)
6x - 18 = - 6
6x = - 6 + 18
6x = 12
x = 12/6
x = 2
========================
g)
5x - 9 = - 8
5x = - 8 + 9
5x = 1
x = 1
      5
============================
h)
9x - 2 = - 11
9x = - 11 + 2
9x = - 9
x = - 9/9
x = - 1