6 [ 2 (3.4 + 8.7) -4-3.2 evaluate the expression

Step-by-step explanation:

We need to evaluate the expression as follows :

We can solve it step by step :

Hence, the answer to the given expression is 102.

in problems involving proportions, we can use cross products to test whether two ratios are equal and form a proportion. to find the cross products of a proportion, we multiply the outer terms, called the extremes, and the middle terms, called the means.

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