Question

x-1 = 2(y +6)
x+ 6 = 3(1 -2y )

Answer 1

{x - 1 = 2(y + 6)
{x + 6 = 3(1 - 2y )

▪x - 1 = 2(y + 6)
x - 1 = 2y + 12
x - 2y = 12 + 1
x - 2y = 13
x = 13 + 2y

▪x + 6 = 3(1 - 2y )
x + 6 = 3 - 6y
x - 6y = 3 - 6
x - 6y = -3
(13 + 2y) - 6y = -3
13 + 2y - 6y = -3
-4y = -3 - 13
-4y = -16
y = -16/-4
y = 4

■x = 13 + 2y
x = 13 + 2 (4)
x = 13 + 8
x = 21