Download Unit 4 review

Pre-Algebra
Unit 4 Review
Unit 4 Review
1) Use Algebraic Properties to solve. Justify each step.
a) -4(2x – 2) + 3x = 38
Unit 4 Review
1) Use Algebraic Properties to solve. Justify each step.
a) -4(2x – 2) + 3x = 38
-8x + 8 + 3x = 38
Distrib. Prop.
5x + 8 = 38
combining like terms
5x + 8 – 8 = 38 – 8
Subtr. Prop of =
5x = 30
5x / 5 = 30 / 5
x=6
Division Prop of =
Unit 4 Review
2) Solve.
a) -12 + 4n = 6(n – 2)
b)
2y – 3 = 2(y + 5) + y
Unit 4 Review
2) Solve.
a) -12 + 4n = 6(n – 2)
b)
2y – 3 = 2(y + 5) + y
n=0
y = -13
Unit 4 Review
3) Solve.
Five more than twice a number is the same as
when one is subtracted from the number.
What is the number?
Unit 4 Review
3) Solve.
Five more than twice a number is the same as
when one is subtracted from the number.
What is the number?
5 + 2n = n - 1
n = -6
Unit 4 Review
4) Solve.
Three more than one fourth of a number is
one more than half the number. What is the
number?
Unit 4 Review
4) Solve.
Three more than one fourth of a number is
one more than half the number. What is the
number?
3+¼n=1+½n
n=8
Unit 4 Review
5) Solve.
a) 3(6 – 4x) = -2(6x – 9)
b)
2(3x + 5) = 5(2x – 4) – 4x
Unit 4 Review
5)
Solve.
a) 3(6 – 4x) = -2(6x – 9)
identity
b)
2(3x + 5) = 5(2x – 4) – 4x
no solution