Answer:
Answer: Both A.) 2x + 1 and D.) x + 3.1 + x – 2.1
Explanation:
0.75x + 0.25(x + 12.4) + (x – 2.1)
distribute 0.25 in the middle term 0.25 × 12.4 = 3.1
and "multiply by +1" the second parentheses to remove them
0.75x + 0.25x + 3.1 + x – 2.1
add the decimal coefficients 0.75x + 0.25x = 1.00x (means 1x) so: = x
x + 3.1 + x - 2.1 This is choice D an equivalent expression
simplify by combining like terms to get
2x + 1 This is choice A