12x - 3y = 6 2x - y = 2

x = 0

y = -2

Step-by-step explanation:

to solve this simultaneous equation we are going to say

let

12x - 3y = 6 equation 1

2x - y = 2 equation 2

from equation 2

2x - y = 2 equation 2

2x - 2 = y

y = 2x - 2 equation 3

substitute the value of y into equation 1

12x - 3y = 6 equation 1

12x - 3( 2x -2) = 6

12x -6x + 6 = 6

6x + 6 = 6

6x = 6-6

6x = 0

divide both sides by 6

6x/6 = 0/6

x = 0

put the value of x = 0 into equation 3

y = 2x - 2 equation 3

y = 2(0) - 2

y = 0 - 2

y = -2

therefore from the solution the value of x is equal to zero(0) and the value of y is equal to -2 respectively.

7 ft 6 in means 7 1/2, because 6 in is 1/2 of a foot. 7 ft 8 in means 7 2/3 because 8 in is 2/3 of a foot. 23/3 = 7 2/3. 15/2 = 7 1/2.

23/3   *   15/2   = 57 1/2

step-by-step explanation: