The equations are
.
Equation (1)
Equation (2)
Since
, substitute 5x for y in the second equation.

(Multiply:
)
(Add: 2x + 15x = 17x)
Apply division property of equality: If a = b then
.
(Divide each side by 17)
(Cancel common terms)
(Divide:
)
Substitute
in first equation.
(Multiply:
)
The solution is
.