Solve the system of equations.

Question

asked Aug 11, 2019 107k views

2 Answers

PhirePhly · Answer 1 · 2019-08-15T07:53:42+0000

For this case we have a system of two equations with two unknowns:

$y = 9x\\y = 2x + 63$

Matching we have:

9x = 2x + 63

subtracting 2x on both sides of the equation:

$9x-2x = 2x-2x + 63\\7x = 63$

Dividing between 7 on both sides of the equation:

$\frac {7x} {7} = \frac {63} {7}\\x = 9$

We find the value of y:

$y = 9 (9)\\y = 81$

ANswer:

$x = 9\\y = 81$