5) 2x + y = 28
-3x + 7y = 26

x = 10.353, y = 8.706

Step-by-step explanation:

2x+y = 28 eqn..(1)

–3x+7y = 26 eqn..(2)

Transpose y in eqn(1), which is;

2x+y = 28; y = 28–2x

Plug in y in eqn(2)

–3x+7(28–2x) = 26

–3x–14x+196 = 26

–17x = 26–196

–17x = –176

x = 10.353

plug in x in any of the eqn..

2(10.353)+y = 28

20.706+y = 28

y = 28–20.796

y = 8.706

-4

step-by-step explanation:

do 6-10=

if u need it to be negative.

there are infinitely many solutions.