Answer:
(-1,4)
Explanation:
-3x + y = 7......y = 3x + 7
so sub in 3x + 7 in for y back into the other equation
5x + 2y = 3
5x + 2(3x + 7) = 3 ...distribute thru the parenthesis
5x + 6x + 14 = 3....subtract 14 from both sides
5x + 6x = 3 - 14...combine like terms
11x = - 11...divide both sides by 11
x = -11/11
x = -1
now that we know x = -1, we can sub that back into either of the original equations to find y
y = 3x + 7
y = 3(-1) + 7
y = -3 + 7
y = 4
so we have (-1,4) as a solution....but lets check it first
-3x + y = 7
-3(-1) + 4 = 7
3 + 4 = 7
7 = 7 (correct)...it checks out
so ur solution is : x = -1 and y = 4 or (-1,4)