Question

ALGUEM ME AJUDA PFVR??!! É URGENTE!!!!!​

Answer 1

a) 2x - 4 + 6 = 20

2x = 20 + 4 - 6

2x = 18

x = 18/2

x = 9

b) -15 + 5x = 25

5x = 25 + 15

5x = 40

x = 40/5

x = 8

c) -3x + (-1 + 4) = 9

-3x + 3 = 9

-3x = 9 - 3

-3x = 6

x = -6/3

x  = -2

d) 2x - (1 + 3 - 6) = 12

2x - (-2) = 12

2x + 2 = 12

2x = 12 - 2

2x = 10

x = 10/2

x = 5

e) 3x + 5x = 72

8x = 72

x = 72/8

x = 9

f) -x - 8x = 18

-9x = 18

x = -18/9

x = -2

g) 5x + 2x + 4x = 121

11x = 121

x = 121/11

x = 11

h) 7x - 2 = 5x + 10

7x - 5x = 10 + 2

2x = 12

x = 12/2

x = 6

i) x + 1 = 5 - x

x + x = 5 - 1

2x = 4

x = 4/2

x = 2

j) 4x + 6 = 6x + 10

4x - 6x = 10 - 6

-2x = 4

x = -4/2

x = -2