Question

k) 15(x - 2) = 7 (x - 2) + 16
l) 3(5 + 2x) + 4x = 1455
m) 3x - 8 = 5x
n) 5(x + 2) = 9(x - 2) + 16​

Answer 1

Resposta:

k) 15 (x-2) = 7 (x-2) + 16

15x - 30 = 7x - 14 + 16

15x - 7x = -14 + 16 + 30

8x = 32

x = 32/8

x = 4

l) 3 (5+2x) + 4x = 1455

15 + 6x + 4x = 1455

10x = 1455 - 15

x = 1440/10

x = 144

m) 3x - 8 = 5x

3x-5x = 8

-2x = 8

x = 8/-2

x = -4

n) 5 (x + 2) = 9 (x - 2) + 16

5x + 10 = 9x - 18 + 16

5x - 9x = - 18 + 16 - 10

-4x = - 12

x = -12/-4

x = 3