Question

Correct the subtraction

(12x−1.6)−(18x+7.2)=12x−1.6−18x+7.2=

a) −6x+5.6
b) −6x−5.6
c) 6x−5.6
d) 6x+5.6

Answer 1

The subtraction of (12x-1.6)-(18x+7.2) is corrected by distributing the negative sign and combining like terms, resulting in -6x + 5.6 as the correct answer.

Step-by-step explanation:

To correct the subtraction (12x−1.6)−(18x+7.2), we first distribute the negative sign inside the second parentheses, which changes the signs of the terms inside. The correct subtraction process is:

12x - 1.6 - 18x - (-7.2)

Let's solve it step by step:

1. Combine the like terms for the x variable: 12x - 18x = -6x.
2. Note that - (-7.2) becomes +7.2, and combine the constant terms: -1.6 + 7.2 = 5.6.
3. Now, put the results together: -6x + 5.6.

So, the correct answer is -6x + 5.6, which corresponds to option (a).