CPM Homework Help : INT1 Problem A-53

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Home > INT1 > Chapter A > Lesson A.1.5 > Problem A-53

A-53.

Simplify each expression below as much as possible. Record your work in the same way you did in problem A-51.

$3y − y + 5x + 3 − 7x$
Step 1(a):
Flip subtraction to addition.
$3y + −y + 5x + 3 + −7x$
Step 2(a):
Remove zero pairs.
$2y + −2x + 3$
Step 3(a):
Remember to remove unnecessary signs (Example: $x + −2$ would be $x − 2$ ).
Answer (a):
$2y − 2x + 3$

$−1−(−5x)−2x+2x^2+7$
Hint 1(b):
Follow the steps described in part (a).
Hint 2(b):
Remember a negative multiplied by a negative is a positive.
Hint 3(b):
Remember you cannot add variables with different exponent values. (Example: you cannot add $x + x²$ )
Answer (b):
$2x^{2} + 3x +6$

$6x + 2 − 1 − 4x − 3 − 2x + 2$
Hint (c):
Follow the steps explained inpart (a) and remember the hints in part (b)

$\frac{2}{3}x−3y+\frac{1}{3}x+2y$
Hint (d):
$\frac{2}{3}\textit{x}+\frac{1}{3}\textit{x}\ =\ \textit{x}$

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