Question

8x+3y=4
-7x+5y=-34
elimination using multiplacation.

Answer 1

hmm..

Answer 2

8x + 3y = 4 --->(5)8x + 3y = 4
-7x + 5y = - 34 ->(-3)-7x + 5y = - 34
----------------
40x + 15y = 20 (result of multiplying by 5)
21x - 15y = 102 (result of multiplying by -3)
---------------add
61x = 122
x = 122/61
x = 2

now sub 2 in for x in either of the original equations..
8x + 3y = 4
8(2) + 3y = 4
16 + 3y = 4
3y = 4 - 16
3y = -12
y = -12/3
y = -4

check...you can use either of the original equations...
-7x + 5y = -34
-7(2) + 5(-4) = -34
-14 - 20 = -34
-34 = -34 (correct)

ANSWER : x = 2 and y = -4

Answer 3

my gosh. thank you.

Answer 4

your welcome :)