Name ________________________________________________Period ________
MATH 7 - Review Unit 11 - Equivalent Expressions
Simplify the expressions.
10) −8(2x − y + 3)
1) -5xy + 3xy + 8
11) 5(7xy − 2) − 32xy
2) 7a – 6a + 4ab
12)
1
(7x + 35)
7
13)
3
(10x − 5y) − 2x
5
3) −5x + 2y + 8x − 6y
4) (3x − 7y) + ( −2x + 8y)
14) .6(a + 2b) − b
5) .2x + .5x + .3y + .7y
15) 5x(y + 9)
1
4
6) − k + k
5
5
16) −4(a + 2b) + 3b
7) 1.2(5a)(b)
17) −(x − 4) + 5x
8) −
1
( −84xy )
7
18) 4(x + 2) + 3(x + 1)
2
9) − (27k)
9
19) 5(a − 2b) − 3(a + 4b)
Concept Check
Circle the correct response.
Test Preparation
Circle the correct response.
Which one of the following can be added to 8x to
make 12x because it and 8x are "like terms"?
Which expression is equivalent to 7(x + 2y) − (x + 10y)?
8
7y
4x
4
a) 6x + 4y
b) 8x + 4y
c) 6x + 23y
d) 6x -12y
More Challenging
Factor the expressions.
3x + 6y − 9xy
3x + 6xy − 9xz
Mathematical Reasoning
Replace the question mark with a number to make the
expressions equivalent.
7(?x - 5) = 21x - 35
?(9x - 2) = 36x - 8
?(10x - 15) = 2x - 3
Review
What is the coefficient of y?
−7x + y + 3
Review
Gary simplified the following expression. In your own
words what was the first thing he did wrong?
= 3(x + y) − (2x + y)
= 3x + 3y − 2x + y
= x + 4y
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