# Sample algebra questions (using the addition method)

Solve each system by the addition method

# 9 x - y = 12

2x + y = 3

# 10 x - 2y = 1

-- x + 5y = 4

# 11 2x - y = 5

3x + 2y = 3

# 12 3x + 5y = 11

x - 2y = 11

# 18 x + y= 13

22x + 36y = 356

Solve each system by the addition method. Determine whether the equations are independent, dependent, or inconsistent.

# 19 3x - 4y = 9

--3x + 4y = 12

# 20 x -- y = 3

--6x + 6y = 17

# 23 2x - y = 5

2x + y = 5

# 24 -- 3x + 2y = 8

3x + 2y = 8

Solve each system by the addition method

# 28 x y 5

-- -- -- = -- --

3 2 6

X y 3

-- -- -- = -- --

5 3 5

# 29 1 1

--x + -- y = 5

8 4

1 1

-- --x + --y = 7

# 30 3 5

--x + --y = 27

7 9

1 2

--x + --y = 7

9 7

# 40 Low fat yogurt. Ziggy`s Famous yogurt blends regular yogurt that is 3% fat with its no-fat yogurt to obtain low-fat yogurt that is 1% fat How many pounds of regular yogurt and how many pounds of no-fat yogurt should be mixed to obtain 60 pound of low-fat yogurt?

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