Question

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solve the system by subtracting the equations​

Answer 1

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 !