( 3x + 8 ) - ( 2x + 7 ) when x=3

4

Step-by-step explanation:

First, substitute x for 3 and simplify

(9 + 8) - (6 + 7)

Simplify again

17 - 13

Simplifly once more

4

answer 4

method: if x=3

Sol (3(3)+8) - (2(3)+7) changed x=3

Then multiply =(9+8) - (6+7)

Add and subtract = 17-13

Then subtract and you will have your answer =4

Hope it helped

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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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