Question

solve by elimination please show your work
7x+2y=10
-7x+y=-16

Answer 1

7x + 2y = 10
-7x + y = - 16
-------------add
0 + 3y = -6
3y = - 6
y = - 2

now sub -2 in for y in either of the original equations
7x + 2y = 10
7x + 2(-2) = 10
7x - 4 = 10
7x = 10 + 4
7x = 14
x = 2

check...
-7x + y = - 16
-7(2) + (-2) = - 16
-14 - 2 = - 16
-16 = -16 (correct)

ANSWER : x = 2 and y = - 2......(2,-2)

Answer 2

thanks

Answer 3

your welcome :)