my teacher: me:
(1) x+y=670 " ? "
(2) 7x+5y=3740 somebody please
__________ explain this to me
(1) -7x-7y=4690 step by step, thanks:)
-2y=-900
y=450
x + y = 670
and
7x + 5y = 3740.
With two equations, you have enough information to solve for both x and y.
Multiply both sides of the first equation by 7
7x + 7y = 4690
Subtract the previous equation from that
7x + 5y = 3740
_______________
2y = 950
y = 475
x = 670 - 475 = 195