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# 20 Problems : Solving Systems of Equations, Simpliying Expression and Solving Equations

Perform the indicated operation:
1)
2)
3)
4)
5)

Simplify:
6) -6x + 3x
7) (-7r)(-5r
8) 2a(a + 4) -5(3a - 2)
9) 7a - 5(a + 2) - 3 - a

10) Find the value given a = 4, b =3 and c =2: c
Solve each equation
11) + 5 = 14
12) -4y = -4 + 6y
13)
14) 5y - 5(2y + 2) = 0

Solve for y:

18) 5x -(2 + 7y)
19) -7y + 8x - 9
20)

Solve each system:
28) 29) 30)
3x + 2y = 9 -4x + -2y = 12 -2(x + y) - 3 = 5x + 3y -10
-4x + 7y = 7 -5y - 2x = -10 -3y - (x +2) = 3y - 5x + 5

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#### Solution Preview

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Perform the indicated operation:

1) = 1/28

2) = 7/20
3)
4) =
5) =

Simplify:
6) -6x + 3x = -6x + 3x

7) (-7r)(-5r = 35r3

8) 2a(a + 4) -5(3a - 2) = 2a2 + 8a - 15a + 10 = 2a2 - 7a + 10

9) 7a - 5(a + 2) - 3 - a = 7a - 5a - 10 - 3 - a = a - 13

10) Find the value given a = 4, b =3 and c =2
c = 23 + 4*4*2 - 2*2(3 - 4) = 8 + 32 + ...

#### Solution Summary

Solving Systems of Equations, Simpliying Expression and Solving Equations are investigated. The solution is detailed and well presented.

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