Chapter 2Pre Test
1. x – 9 = -12+9
x = -3
+9
Step 5
x = 6
-3-3x = -18-3
2.
Step 6Step 7
( )x = 1551
x = 75
5( )53.
Step 2
3
3x – 9 = 6
3
x = 5
3x = 15+9 +9
4.
Step 5Step 6Step 7
2
7x – 3 = 5x + 11
2
x = 7
2x = 14
+3 +3-5x -5x5.
Step 4Step 5Step 6Step 7
2
7x + 1 – 5x + 3 = 12
2
x = 4
2x = 8
-4 -42x = 12+ 4
6.
Step 3Step 5Step 6Step 7
7. 2.3x – 3.7 = 2.9x – 7.3
-6
2.3x – 3.7 = 2.9x – 7.3
-6
x = 6
-6x = -36
+37 +37-29x -29x
10( ) 10( ) 10( ) 10( )
23x – 37 = 29x – 73
Step 2Step 4Step 5Step 6Step 7
10
2(4x – 5) – 6 = 8 – 2(x – 8)
1010x = 40
+16 +16+2x +2x
8x
8x – 16
x = 4
= 24 – 2x
– 10 = 8 – 2x – 6 + 16
8.
Step 1Step 3Step 4Step 5Step 6Step 7
Step 5Step 6Step 7
-3
1241
9. x + = x
( ) ( ) ( )1212124 4 3
4x-3-8x -8x
x = 3
( )
-4-4-4x = -12
LCD = 1231
41
32
43–
3x
32x
43–=+
3
+ 3 = 8x – 9
Step 2Step 4
-1
-2x
– ( )
10. =
( ) ( )441 1 2
x + 1-1 -1-2x
x = 3
41 –
( )4
-1-x = -3
(x + 1) x21
21
=4x + 2
x41
214
2
LCD = 4
= 2x – 2
Step 1Step 2Step 4Step 5Step 6Step 7
1241
11. x – + = x
1212124 6
4x
-3 -3-12x -12x
-8-8-8x = -3
LCD = 1231
41
21
3x
21 =+–
3
– 3 + 6 = 12x
x
4x + 3 = 12x
x =
( ) ( ) ( ) ( )
Step 2Step 3Step 4Step 5Step 6Step 7
12. = 5
( ) ( )331
x – 6+6 +6
x = 21
31
( )3
(x – 6)
=3x – 5
LCD = 3
= 15
Step 1Step 3Step 5
2
13. Solve for y.
-5
4x – 5y = 10
-5-5y = -4x + 10
-4x-4x
y = -4x + 10-5-5
y = – 245 x
Step 4Step 6Step 7
y = – 254 (5)
14. Go back to question and answer 13 and find y when x = 5.
y = 4 – 2
y = 2
y = – 245 x
1
15. Solve for d
πC = πdπ
d = Cπ
Step 6
16. Go back to question and answer 15 and find d when C = 314 and π = 3.14
d = Cπ
d = 3143.14
d = 100
Chapter 2
Pre Test
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