Question

resolva as equações u=q
a) 3x=45
b)2x+4=10
c) x-8=15
d)xsobre20=10
e) 2x +4x =16+8
f)9x -6x =50-11
g) x sobre 4 - 1 sobre 5 =3
h) 1 sobre 5 +4x =3
i) y+3y +2y =40-4
j)12y -4y =20+44
k) 5x -10=4x+20
l)2 (x-4)=20
m) 3 (x-1)=27
n)12x -5x =49
o) 6x +30=4x +4
p)4x+2x=30+6
q)x-20=32
r) 10x -2x =100-36
s) x +2x +5x =40-8

Answer 1

a)3x=45
x=45/3
x=15


B) 2x+4=10
2x=10-4
2x=6
x=6/2
x=3


C) x-8=15
x=15+8
x=23


e) 2x+4x=16+8
6x=24
x=24/6
x=4


f) 9x-6x=50-11
3x=39
x=39/3
x=13


i) y+3y+2y=40-4
6y=36
y=36/6
y=6


j) 12y-4y=20+44
8y=64
y=64/8
y=8


k) 5x-10=4x+20
5x-4x=20+10
x=30



L) 2(x-4)=20
2x-8=20
2x=20+8
2x=28
x=28/2
x=14


M) 3(x-1)=27
3x-3=27
3x=27+3
3x=30
x=30/3
x=10


n) 12x-5x=49
7x=49
x=49/7
x=7


o) 6x+30=4x+4
6x-4x=4-30
2x=-26
x=-26/2
x=-13


p) 4x+2x=30+6
6x=36
x=36/6
x=6


q) x-20=32
x=32+20
x=52


r) 10x-2x=100-36
8x=64
x=64/8
x=8


s) x+2x+5x=40-8
8x=32
x=32/8
x=4