simplify expressions
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1. Find an equivalent expression without parentheses:
-(8x + 4)
-(-2a + 9b - 5c)
2. Remove parentheses and simplify:
4y - (y + 5)
3a - 9b - 1/4a - 8b)
3. Simplify:
[9(x + 5) - 7] + [4(x - 12) + 9]
[6(x + 4) - 12] - [5(x - 8) + 14]
4. Simplify:
4 to the 3rd power + 10 x 20 + 8 to the second power - 23
4 x (6 + 8)/(4 + 3)
8[(6 - 13) - 11]
20(8 - 3) - 4(10 - 3)
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10(2 - 6) - 2(5 + 2)
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1. -(8x + 4) = -8x -4
-(-2a + 9b - 5c) = -(-2a) -9b -(-5c) = 2a -9b +5c
2. After removing the parentheses, combine the like terms to simplify.
4y - (y + 5) = 4y -y -5 = (4y -y) -5 = 3y -5
3a - 9b - (4a - 8b) = 3a - 9b - 4a - (-8b) = 3a - 9b - 4a + 8b = (3a - 4a) + (-9b + 8b)= (-a) + (-b) = -a - b
3. First remove the ...
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