Question

a) 12x – 95 = 7x – 15 X
b) 10x + 28 = 3x
c) 24 - 15x = - 21
d) 26 - 4y - 9x = -13​

Answer 1

a) 12x - 95 = 7x - 15x

12x - 95 = -8x

12x + 8x = 95

20x = 95

x = 95/20

x = 19/4 = 4,75

b) 10x + 28 = 3x

10x - 3x = -28

7x = -28

x = - 28/7

x = -4

c) 24 - 15x = -21

-15x = -21 - 24

-15x = -45 (.-1)

15x = 45

x = 45/15

x = 3

d) 26 - 4y - 9x = -13

-4y - 9x = -13 - 26

-4y - 9x = -39 (.-1)

4y + 9x = 39