Question

por favor me ajude

A- x+30=40?
B- 30-20+2x=10?
C- 3x-10+13=-2x+28?
D- 20x-30=40+30-20?
E- -5x+45-89=-90+41?
F- 10x-20=40+50?
G- 20-80+2x=10?
H- 19+2x-13=10-20?
I- 1Ox-12+10=+18-20?
J- 13x-23-45=-7x+12?

Answer 1

A
x + 30 = 40
x = 40 - 30
x = 10

B
30 - 20 + 2x = 10
10 + 2x = 10
2x = 10 - 10
2x = 0
x = 0/2 = 0

C
3x - 10 + 13 = -2x + 28
3x + 3 = -2x + 28
3x + 2x = 28 - 3
5x = 25
x = 25/5
x = 5

D
20x - 30 = 40 + 30 - 20
20x = 50 + 30
20x = 80
x = 80/20
x = 4

E
-5x + 45 - 89 = -90 + 41
-5x - 44 = -49
-5x = -49 + 44
-5x = -5
x = -5 + 5
x = 0

F
10x - 20 = 40 + 50
10x = 90 + 20
10x = 110
x = 110/10
x = 11

G
20 - 80 + 2x = 10
-60 + 2x = 10
2x = 10 + 60
2x = 70
x = 70/2
x = 35

H
19 + 2x - 13 = 10 - 20
6 + 2x = -10
2x = -10 - 6
2x = -16
x = -16/2
x = -8

I
10x - 12 + 10 = 18 - 20
10x - 2 = -2
10x = -2 + 2
10x = 0
x = 0/10
x = 0

J
13x - 23 - 45 = -7x + 12
13x + 7x = 12 + 23 + 45
20x = 80
x = 80/20
x = 4