Question

Resolva as seguintes equações:
A) × - 3 = -12× + 10
B) 2 × - 3 = 5
C) -21x - 7 = -X + 53
D) 2 X -3 + X = 18
E) 3x - 7 = 2x + 5
F) 7x + 8 = 4x - 10

Answer 1

A-

X-3=12X+10
X+12X=10+3
13X=13
X=13/13
X=1

B-

2X-3=5
2X=5+3
2X=8
X=8/2
X=4

C-

-21X-7=-X+53
-21X+X=53+7
-20X=60 (-1)
20X=-60
X=-60/20
X= -6/2
X= -3

D- 

2X-3-X=18
2X+X=18+3
3X=21
X=21/3
X=7

E-

3X-7=2X+5
3X-2X=5+7
X=12

F-

7X+8=4X-10
7X-4X=-10-8
3X=-18
X= -18/3
X= -6

Answer 2

Resposta:

Explicação passo-a-passo:

A-

X-3=12X+10

X+12X=10+3

13X=13

X=13/13

X=1

B-

2X-3=5

2X=5+3

2X=8

X=8/2

X=4

C-

-21X-7=-X+53

-21X+X=53+7

-20X=60 (-1)

20X=-60

X=-60/20

X= -6/2

X= -3

D-  

2X-3-X=18

2X+X=18+3

3X=21

X=21/3

X=7

E-

3X-7=2X+5

3X-2X=5+7

X=12

F-

7X+8=4X-10

7X-4X=-10-8

3X=-18

X= -18/3

X= -6