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Sagot :
Answer:
1. 4x
2. 3x+9
3. 8x-21
Step-by-step explanation:
1. Combine like terms (3x)+(2x)(-x)
2. 3(x+3)
3x+9
3. 6x-3+2(x-9)
6x-3+2x-18
6x-3+2x-18
6x-21+2x
6x-21+2x
8x-21
Answer:
3x + 2x - x = 4x
3(x+3) = 3x + 9
6x - 3 + 2(x-9) = 8x - 21
Step-by-step explanation:
For the first question, we add 3x and 2x, getting 5x, then subtract x, getting 4x.
For the second question, we distribute 3 to the part in parentheses, getting us the new expression, 3x+9.
For the last question, first we need to distribute 2. We then get 6x - 3 + 2x - 18. We can then combine like terms, and we get 8x - 21.
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