Question

Resolva as seguintes equações:
a) x + 4 = 15
b) 2x – 5 = x + 10
c) 5x – 3x – 8 = – 29 + 9x
d) 3 + x = 0
e) 23x + 2 = 2
f) 12 – 7 + 4x = 25
g) 5x – 3x = 30
h) 4x + 10 = 45 – 3x
i) 4x – 7 = 1
j) x + 2 = 5
k) 2y – 4 = 2
l) 2 a + 4 = - 6
m) - 2 + 5y = 13
n x + 1 = 3
o) 4 – 9x = 2
p) 3z - 7 = 12

Answer 1

A
x=15-4
x=11

B
2x-5=x+10
2x-x=10+5
x=15

C
5x-3x-8=-29+9x
5x-3x-9x=-28+8
-7x=-20
7x=20
x=20/7

D
3+x=0
x=-3

E
23x+2=2
23x=0
x=0

F
12-7+4x=25
4x=25-12+7
4x=20
x=5

G
5x-3x=30
2x=30
x=15

H
4x+10=45-3x
4x+3x=45-10
7x=35
x=5

I
4x-7=1
4x=8
x=2

J
x+2=5
x=3

K
2y-4=2
2y=6
y=3

L
2a+4=-6
2a= -10
a= -5

M
-2+5y=13
5y=13+2
5y=15
y= 3

N
x+1=3
x=2

O
4-9x=2
-9x= 2-4
-9x= -2
9x= 2
x= 2/9

P
3z-7=12
3z=12+7
3z=19
z=19/3

Answer 2

Resposta:

a)×+4=15

×=15-4

×=11

b)2×-5=×+10

2×-5=×+10

2×-×=10+5

×=15

Explicação passo-a-passo:É só isso que eu me lembro.