Answer:
Step-by-step explanation:
3. 2x + 5y = 190
2x + 3y = 130
subtract 2 equation
2x + 5y = 190
-- 2x + 3y = 130
0x + 2y = 60
y = 30
substitute y for 1 equation:
2x + 3( 30 ) =130
2x + 90 = 130
2x = 130-90
2x = 40
x= 20
4. 6x + 3y = 24
6x - 2y = 14
subtract 2 equation
we got y=2
6x - 6x = 0
3y- -2y = 5y
24-14=10
10/5 = 2
substitute y for 1 equation you want
6x - 2(2)= 14
x = 3
THOSE ARE CORRECT ANSWERS !
