Question

PLSS HELP

what’s the solution for the following equation

7x + 6y = 60
3x - 6y = 40

Answer 1

x=10, y=
`-(10)/(6)`

Explanation:

Add the two equations together

10x + 0y = 100 (+6y + (-6y) =0)

10x = 100

x = 10

substitute x=10 into 3x-6y=40 (either equation is fine)

3(10) - 6y=40

30-6y=40

-6y=10

y=
`-(10)/(6)`