Question

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A:10x=2x+60

B:3x=x+8

C:13x-9=4x+9

D:9x-8=5x+30

E:7x=3x+240

F:10x=2x+680

G:13x=6x+490

H:6x=2x+240

I:8x=5x+270

J:14x=196

K:6x=360

L:3x=600

M:2x=280

Answer 1

A:
10x=2x+60
10x - 2x = 60
8x = 60
x = 60/8  ( divide AMBOS po 4)
x = 15/2

B:
3x=x+8
3x - x = 8
2x = 8
x = 8/2
x = 4


C:
13x-9=4x+9
13x - 9 - 4x = 9
13x - 4x = 9 + 9
9x = 18
x = 18/9
x = 2

D:
9x-8=5x+30
9x - 8 - 5x = 30
9x - 5x = 30 + 8
4x = 38
x = 38/4  ( divide AMBOS por 2)
x = 19/2

E:
7x=3x+240
7x - 3x = 240
4x = 240
x = 240/4
x = 60


F:
10x=2x+680
10x - 2x =  680
8x = 680
x = 680/8
x = 65

G:
13x=6x+490
13x - 6x = 490
7x = 490
x = 490/7
x = 70

H:
6x=2x+240
6x - 2x = 240
4x = 240
x = 240/4
x = 60

I:
8x=5x+270
8x - 5x = 270
3x = 270
x = 270/3
x = 90

J:
14x=196
x = 196/14
x = 14


K:
6x=360
x = 360/6
x = 60

L:
3x=600
x = 600/3
x = 200

M:
2x=280
x = 280/2
x = 140

Answer 2

A:10x=2x+60
10x - 2x = 60
8x = 60
x = 60/8 (( simplifica por 4 ))
x = 15/2






B:3x=x+8
3x - x = 8
2x = 8
x = 8/2
x = 4











C:13x-9=4x+9
13x - 4x = 9 + 9
9x = 18
x = 18/9
x = 2











D:9x-8=5x+30
9x - 5x = 30 + 8
4x = 38
x = 38/4 (( simplifica por 2 ))
x = 19/2












E:7x=3x+240
7x - 3x = 240
4x = 240
x = 240/4
x = 60









F:10x=2x+680
10x - 2x = 680
8x = 680
x = 680/8
x = 85








G:13x=6x+490
13x - 6x = 490
7x = 490
x = 490/7
x = 70







H:6x=2x+240
6x - 2x = 240
4x = 240
x = 240/4
x = 60







I:8x=5x+270
8x - 5x = 270
3x = 270
x = 270/3
x = 90






J:14x=196
x = 196/14
x = 14



K:6x=360
x = 360/6
x = 60


L:3x=600
x = 600/3
x = 200

M:2x=280
x = 280/2
x = 140