Evaluate the expressions 1)4x+12-3x+8
2)-8x+1+2x-1+6x
3)4x-3-2x-5
4)100x5-5x+5
5)-4x-4-2-5x
6)2x-1+2x-4+y
7)5y-x+2y-y+5
8)-15+3y-3x-2y+4x
9)4-3y+3x-2x-y

1. x + 20

2. 0

3. 2x - 8

4. 95x + 10

5. -9x - 6

6. 4x + y - 5

7. -x + 6y + 5

8. x + y - 15

9. x + 4y + 4

• When working with variables and numbers, you have to put the variables first (in alphabetical order) and then the numbers.

• To evaluate an algebraic expression, we find the value of the expression when the variable is replaced by a given number.

• To evaluate an expression, we substitute the given number for the variable in the expression and then simplify the expression using the order of operations.

• When we are not given a number for the variable in the expression, we have to group like-terms.

1. 4x + 12 - 3x + 8

2. -8x + 1 + 2x - 1 + 6x

3. 4x - 3 - 2x - 5

4. 100x + 5 - 5x + 5

5. -4x - 4 - 2 - 5x

6. 2x - 1 + 2x - 4 + y

7. 5y - x + 2y - y + 5

8. -15 + 3y - 3x - 2y + 4x

9. 4 - 3y + 3x - 2x - y

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step-by-step explanation:

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