7x + 5y = 19
<u>-7x - 2y = -16</u>
<u>3y</u> = <u>3</u>
3 3
y = 1
7x + 5y = 19
7x + 5(1) = 19
7x + 5 = 19
<u> -5 - 5</u>
<u>7x</u> = <u>14</u>
7 7
x = 2
(x, y) = (2, 1)
The method would be a elimination method (the answer is C).
The commutative property pf addition is a+b=b+a
1 all real numbers
2 no solution
3 x=0
-6= b/8
-6= b/8
-48=b
The answer is B= -48
