Question

3√x - 1 - 4√y +6 = -2
√x - 1 + 2√y + 6 = 6

Answer 1

3√x - 1 - 4√y +6 = -2
3√x - 4√y + 5 = -2
3√x - 4√y = -7 ........(a)
 √x - 1 + 2√y + 6 = 6
√x + 2√y + 5 = 6
√x + 2√y = 1 ..........(b)
eliminasi :
3√x - 4√y = -7  |kali 1
√x + 2√y = 1    | kali 2
___________________ +
3√x + 2√x = -7 + 2
5√x = -5
 √x = -1
3√x - 1 - 4√y +6 = -2
3(-1) - 1 - 4√y +6 = -2
-3 - 1 - 4√y +6 = -2
-4√y + 2 = -2
-4√y = -4
√y  = 1